Wednesday, February 25, 2009

Announcement of the bombing in audio

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Truman announcing the bombing of Hiroshima
President Truman announces the bombing of Hiroshima.
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Japanese realization of the bombing
The Tokyo control operator of the Japanese Broadcasting Corporation noticed that the Hiroshima station had gone off the air. He tried to re-establish his program by using another telephone line, but it too had failed.[24] About twenty minutes later the Tokyo railroad telegraph center realized that the main line telegraph had stopped working just north of Hiroshima. From some small railway stops within 16 kilometers (10 mi) of the city came unofficial and confused reports of a terrible explosion in Hiroshima. All these reports were transmitted to the headquarters of the Japanese General Staff.
Military bases repeatedly tried to call the Army Control Station in Hiroshima. The complete silence from that city puzzled the men at headquarters; they knew that no large enemy raid had occurred and that no sizeable store of explosives was in Hiroshima at that time. A young officer of the Japanese General Staff was instructed to fly immediately to Hiroshima, to land, survey the damage, and return to Tokyo with reliable information for the staff. It was generally felt at headquarters that nothing serious had taken place and that it was all a rumor.
The staff officer went to the airport and took off for the southwest. After flying for about three hours, while still nearly one hundred miles (160 km) from Hiroshima, he and his pilot saw a great cloud of smoke from the bomb. In the bright afternoon, the remains of Hiroshima were burning. Their plane soon reached the city, around which they circled in disbelief. A great scar on the land still burning and covered by a heavy cloud of smoke was all that was left. They landed south of the city, and the staff officer, after reporting to Tokyo, immediately began to organize relief measures.
By August 8, 1945, newspapers in the US were reporting that broadcasts from Radio Tokyo had described the destruction observed in Hiroshima. "Practically all living things, human and animal, were literally seared to death," Japanese radio announcers said in a broadcast captured by Allied sources.[25]

Post-attack casualties
According to most estimates, the immediate effects of the blast killed approximately 70,000 people in Hiroshima. Estimates of total deaths by the end of 1945 from burns, radiation and related disease, the effects of which were aggravated by lack of medical resources, range from 90,000 to 140,000.[4][26] Some estimates state up to 200,000 had died by 1950, due to cancer and other long-term effects.[1][27][5] From 1950 to 1990, roughly 9% of the cancer and leukemia deaths among bomb survivors was due to radiation from the bombs.[28] At least eleven known prisoners of war died from the bombing.[29]

The bombing

For the composition of the USAAF mission see 509th Composite Group.

Seizo Yamada's ground level photo taken from approximately 7 km northeast of Hiroshima.
Hiroshima was the primary target of the first nuclear bombing mission on August 6, with Kokura and Nagasaki being alternative targets. August 6 was chosen because there had previously been cloud cover over the target. The 393d Bombardment Squadron B-29 Enola Gay, piloted and commanded by 509th Composite Group commander Colonel Paul Tibbets, was launched from North Field airbase on Tinian in the West Pacific, about six hours flight time from Japan. The Enola Gay (named after Colonel Tibbets' mother) was accompanied by two other B29s, The Great Artiste which carried instrumentation, commanded by Major Charles W. Sweeney, and a then-nameless aircraft later called Necessary Evil (the photography aircraft) commanded by Captain George Marquardt.[18]
After leaving Tinian the aircraft made their way separately to Iwo Jima where they rendezvoused at 2,440 m (8,000 ft) and set course for Japan. The aircraft arrived over the target in clear visibility at 9,855 m (32,000 ft). On the journey, Navy Captain William Parsons had armed the bomb, which had been left unarmed to minimize the risks during takeoff. His assistant, 2nd Lt. Morris Jeppson, removed the safety devices thirty minutes before reaching the target area.[19]

Hiroshima, in the aftermath of the bombing
The release at 08:15 (Hiroshima time) was uneventful, and the gravity bomb known as "Little Boy", a gun-type fission weapon with 60 kg (130 pounds) of uranium-235, took fifty-seven seconds to fall from the aircraft to the predetermined detonation height about six hundred meters (1,900 ft) above the city. Due to crosswind, it missed the aiming point, the Aioi Bridge, by almost eight hundred feet and detonated directly over Shima Surgical Clinic.[20] It created a blast equivalent to about 13 kilotons of TNT. (The U-235 weapon was considered very inefficient, with only 1.38% of its material fissioning.)[21] The radius of total destruction was about one mile (1.6 km), with resulting fires across 11.4 km² (4.4 square miles).[22] Infrastructure damage was estimated at ninety percent of Hiroshima's buildings being either damaged or completely destroyed.
About an hour before the bombing, Japanese early warning radar detected the approach of some American aircraft headed for the southern part of Japan. An alert was given and radio broadcasting stopped in many cities, among them Hiroshima. At nearly 08:00, the radar operator in Hiroshima determined that the number of planes coming in was very small—probably not more than three—and the air raid alert was lifted. To conserve fuel and aircraft, the Japanese had decided not to intercept small formations. The normal radio broadcast warning was given to the people that it might be advisable to go to air-raid shelters if B-29s were actually sighted, but no raid was expected beyond some sort of reconnaissance.

Hiroshima during World War II


At the time of its bombing, Hiroshima was a city of some industrial and military significance. A number of military camps were located nearby, including the headquarters of the Fifth Division and Field Marshal Shunroku Hata's 2nd General Army Headquarters, which commanded the defense of all of southern Japan. Hiroshima was a minor supply and logistics base for the Japanese military. The city was a communications center, a storage point, and an assembly area for troops. It was one of several Japanese cities left deliberately untouched by American bombing, allowing a pristine environment to measure the damage caused by the atomic bomb.

A postwar "Little Boy" casing mockup
The center of the city contained several reinforced concrete buildings and lighter structures. Outside the center, the area was congested by a dense collection of small wooden workshops set among Japanese houses. A few larger industrial plants lay near the outskirts of the city. The houses were of wooden construction with tile roofs, and many of the industrial buildings also were of wood frame construction. The city as a whole was highly susceptible to fire damage.
The population of Hiroshima had reached a peak of over 381,000 earlier in the war, but prior to the atomic bombing the population had steadily decreased because of a systematic evacuation ordered by the Japanese government. At the time of the attack the population was approximately 255,000. This figure is based on the registered population used by the Japanese in computing ration quantities, and the estimates of additional workers and troops who were brought into the city may be inaccurate.

The Manhattan Project

Main article: Manhattan Project
The United States, with assistance from the United Kingdom and Canada in their respective secret projects Tube Alloys and Chalk River Laboratories,[9] designed and built the first atomic bombs under what was called the Manhattan Project. The scientific research was directed by American physicist J. Robert Oppenheimer. The Hiroshima bomb, a gun-type bomb called "Little Boy", was made with uranium-235, a rare isotope of uranium. The atomic bomb was first tested at Trinity Site, on July 16, 1945, near Alamogordo, New Mexico. The test weapon, "the gadget," and the Nagasaki bomb, "Fat Man", were both implosion-type devices made primarily of plutonium-239, a synthetic element.[10]

Choice of targets

Map showing the locations of Hiroshima and Nagasaki, Japan where the two atomic weapons were employed
On May 10–11, 1945 The Target Committee at Los Alamos, led by J. Robert Oppenheimer, recommended Kyoto, Hiroshima, Yokohama, and the arsenal at Kokura as possible targets. The target selection was subject to the following criteria:
They are larger than three miles in diameter and are important targets in a large urban area.
The blast would create effective damage.
They are unlikely to be attacked by August 1945. "Any small and strictly military objective should be located in a much larger area subject to blast damage in order to avoid undue risks of the weapon being lost due to bad placing of the bomb."
These cities were largely untouched during the nightly bombing raids and the Army Air Force agreed to leave them off the target list so accurate assessment of the weapon could be made. Hiroshima was described as "an important army depot and port of embarkation in the middle of an urban industrial area. It is a good radar target and it is such a size that a large part of the city could be extensively damaged. There are adjacent hills which are likely to produce a focussing effect which would considerably increase the blast damage. Due to rivers it is not a good incendiary target." The goal of the weapon was to convince Japan to surrender unconditionally in accordance with the terms of the Potsdam Declaration. The Target Committee stated that "It was agreed that psychological factors in the target selection were of great importance. Two aspects of this are (1) obtaining the greatest psychological effect against Japan and (2) making the initial use sufficiently spectacular for the importance of the weapon to be internationally recognized when publicity on it is released. In this respect Kyoto has the advantage of the people being more highly intelligent and hence better able to appreciate the significance of the weapon. Hiroshima has the advantage of being such a size and with possible focussing from nearby mountains that a large fraction of the city may be destroyed. The Emperor's palace in Tokyo has a greater fame than any other target but is of least strategic value."[11]
During World War II, Edwin O. Reischauer was the Japan expert for the US Army Intelligence Service, in which role he is incorrectly said to have prevented the bombing of Kyoto.[12] In his autobiography, Reischauer specifically refuted the validity of this broadly-accepted claim:
"...the only person deserving credit for saving Kyoto from destruction is Henry L. Stimson, the Secretary of War at the time, who had known and admired Kyoto ever since his honeymoon there several decades earlier."[13]

The Potsdam ultimatum
On July 26, Truman and other allied leaders issued The Potsdam Declaration outlining terms of surrender for Japan. It was presented as an ultimatum and stated that without a surrender, the Allies would attack Japan, resulting in "the inevitable and complete destruction of the Japanese armed forces and just as inevitably the utter devastation of the Japanese homeland" but the atomic bomb was not mentioned. On July 28, Japanese papers reported that the declaration had been rejected by the Japanese government. That afternoon, Prime Minister Kantaro Suzuki declared at a press conference that the Potsdam Declaration was no more than a rehash (yakinaoshi) of the Cairo Declaration and that the government intended to ignore it (mokusatsu lit. "kill by silence").[14] The statement was taken by both Japanese and foreign papers as a clear rejection of the declaration. Emperor Hirohito, who was waiting for a Soviet reply to noncommittal Japanese peace feelers made no move to change the government position.[15] On July 31, he made clear to his advisor Kōichi Kido that the Imperial Regalia of Japan had to be defended at all costs.[16]
In early July, on his way to Potsdam, Truman had re-examined the decision to use the bomb. In the end, Truman made the decision to drop the atomic bombs on Japan. His stated intention in ordering the bombings was to bring about a quick resolution of the war by inflicting destruction and instilling fear of further destruction in sufficient strength to cause Japan to surrender.[17

Atomic bombings of Hiroshima and Nagasaki




The atomic bombings of Hiroshima and Nagasaki were nuclear attacks near the end of World War II against the Empire of Japan by the United States at the executive order of U.S. President Harry S. Truman on August 6 and 9, 1945. After six months of intense fire-bombing of 67 other Japanese cities, the nuclear weapon "Little Boy" was dropped on the city of Hiroshima on Monday,[1] August 6, 1945, [2] followed on August 9 by the detonation of the "Fat Man" nuclear bomb over Nagasaki. These are to date the only attacks with nuclear weapons in the history of warfare.[3]
The bombs killed as many as 140,000 people in Hiroshima and 80,000 in Nagasaki by the end of 1945,[4] roughly half on the days of the bombings. Since then, thousands more have died from injuries or illness attributed to exposure to radiation released by the bombs.[1] In both cities, the overwhelming majority of the dead were civilians.[5][6][7]
Six days after the detonation over Nagasaki, on August 15, Japan announced its surrender to the Allied Powers, signing the Instrument of Surrender on September 2, officially ending the Pacific War and therefore World War II. (Germany had signed its unavoidable[2] Instrument of Surrender on May 7, ending the war in Europe.) The bombings led, in part, to post-war Japan adopting Three Non-Nuclear Principles, forbidding that nation from nuclear armament.[8]

Monday, February 23, 2009

Military of Pakistan


The Pakistan Armed Forces (Urdu: پاک عسکری, Pāk Askarī) are the overall unified military forces of Pakistan. The Pakistani military was first formed when the nation achieved independence from the British Empire during the partition of India in 1947.
Its component branches are:
Pakistan Army
Pakistan Navy
Pakistan Air Force
Paramilitary forces of Pakistan
Pakistan Coast Guard
Pakistan Strategic Nuclear Command
The Army, Navy and Air Force were commissioned in 1947 in anticipation of a potential hostilities against India. From the time of its inception, the military played a decisive role in the History of Pakistan. A sense of national unity and identity was forged out of the wars of 1947 and 1965 against India.
Approximately 650,000 personnel are on active duty in the military which is the world's 7th largest armed force as of 2008.[2] Combined with the 302,000 strong Paramilitary forces and 520,000 in reserve, the Military of Pakistan has a total size of nearly 1,400,000 personnel. The Military draws its manpower from a large pool of volunteers and as such, conscription is not, and has never been needed.[citation needed]
Pakistan's military is led by an officer corps that is not restricted by social class or nobility and are appointed from a variety of sources such as service academies and direct appointment from both civilian status and the enlisted ranks. The armed forces are highly respected in civil society and the social ranks as an institution[citation needed]. September 6 known as Defence Day commemorates the military's role in defense of the nation.
The Pakistani armed forces are the largest contributors to United Nations peacekeeping efforts, with more than 10,000 personnel deployed in 2007.[3] Other foreign deployments have consisted of Pakistani military personnel as advisers in African and Arab countries. The Pakistani military maintained Division and brigade strength presences in some of the Arab countries during the past Arab-Israeli Wars, and the first Gulf War to help the Coalition, in Somalian & Kosovo conflicts.

Notes


ttp://www.fas.org/nuke/guide/pakistan/nuke/index.html. Retrieved on 2007-02-22.
^ "Uranium Institute News Briefing 00.25 14 - 22 June 2000". Uranium Institute. 2000. http://www.world-nuclear.org/nb/nb00/nb0025.htm. Retrieved on 2006-05-07.
^ Key Issues: Nuclear Energy: Issues: IAEA: World Plutonium Inventories
^ BBC NEWS World South Asia Pakistan nuclear report disputed
^ Pakistan Expanding Nuclear Program - washingtonpost.com
^ BBC NEWS World South Asia Pakistan 'building new reactor'
^ U.S. Group Says Pakistan Is Building New Reactor - New York Times
^ Federation of American Scientists
^ Center for Defense Information
^ "US Navy Strategic Insights. Feb 2003". US Navy. 2003. http://www.ccc.nps.navy.mil/si/feb03/southAsia2.asp. Retrieved on 2006-10-28.
^ Pakistan's Nuclear Arsenal Underestimated, Reports Say
^ Impact of US wargames on Pakistan N-arms ‘negative’ -DAWN - Top Stories; December 03, 2007
^ Calculating the Risks in Pakistan - washingtonpost.com
^ China tested N-weapons for Pak: US insider The Times of India September 6, 2008
^ http://www.csis-scrs.gc.ca/pblctns/prspctvs/200110-eng.asp
^ "U.S. Secretly Aids Pakistan in Guarding Nuclear Arms". The New York Times. 2007-11-18. http://www.nytimes.com/2007/11/18/washington/18nuke.html?ref=us. Retrieved on 2007-11-18.
^ New York Times/18 November 2007