"Fat Man" was the codename for the type of nuclear weapon the United States detonated over the Japanese city of Nagasaki on 9 August 1945. It was the second of the only two nuclear weapons ever used in warfare, the first being Little Boy, and its detonation marked the third nuclear explosion in history. It was built by scientists and engineers at Los Alamos Laboratory using plutonium from the Hanford Site, and one was dropped from the Boeing B-29 Superfortress Bockscar piloted by Major Charles Sweeney.
Little Boy was the name of the type of atomic bomb used in the bombing of the Japanese city of Hiroshima on 6 August 1945 during World War II, making it the first nuclear weapon used in warfare. The bomb was dropped by the Boeing B-29 Superfortress Enola Gay piloted by Colonel Paul W. Tibbets Jr., commander of the 509th Composite Group, and Captain Robert A. Lewis. It exploded with an energy of approximately 15 kilotons of TNT (63 TJ) and had an explosion radius of approximately 1.3 kilometers which caused widespread death across the city. The Hiroshima bombing was the second nuclear explosion in history, after the Trinity nuclear test.
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion reactions, producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter.
Marlboro County is a county located in the Pee Dee region on the northern border of the U.S. state of South Carolina. As of the 2020 census, its population was 26,667. Its county seat is Bennettsville. The Great Pee Dee River runs through it.
Marion County is a county located in the coastal plain of the U.S. state of South Carolina. As of the 2020 census, its population was 29,183. Its county seat is Marion. It is a majority-minority county.
Florence County is a county located in the U.S. state of South Carolina. As of the 2020 census, its population was 137,059. Its county seat is Florence.
Society Hill is a town in Darlington County, South Carolina, United States alongside the Pee Dee River. It is the oldest community in Darlington County and one of the first towns founded in South Carolina. The town was once the intellectual center of the Pee Dee region. However, the town's fortunes declined in the 19th century after rivers became less important as means of transportation. It is part of the Florence Metropolitan Statistical Area.
Florence is a city in and the county seat of Florence County, South Carolina, United States. It lies at the intersection of Interstates 20 and 95 and is the eastern terminus of the former. It is the primary city within the Florence metropolitan area. The area forms the core of the historical Pee Dee region of South Carolina, which includes the eight counties of northeastern South Carolina, along with sections of southeastern North Carolina. As of the 2020 census, the population of the city was 39,899, making it the 10th-most populous city in the state.
Marion is a city in and the county seat of Marion County, South Carolina, United States. It is named for Francis Marion, a brigadier general from South Carolina in the American Revolutionary War. The population was 6,939 at the 2010 census.
Operation Grapple was a set of four series of British nuclear weapons tests of early atomic bombs and hydrogen bombs carried out in 1957 and 1958 at Malden Island and Kiritimati in the Gilbert and Ellice Islands in the Pacific Ocean as part of the British hydrogen bomb programme. Nine nuclear explosions were initiated, culminating in the United Kingdom becoming the third recognised possessor of thermonuclear weapons, and the restoration of the nuclear Special Relationship with the United States in the form of the 1958 US–UK Mutual Defence Agreement.
The Tybee Island mid-air collision was an incident on February 5, 1958, in which the United States Air Force lost a 7,600-pound (3,400 kg) Mark 15 nuclear bomb in the waters off Tybee Island near Savannah, Georgia, United States. During a night practice exercise, an F-86 fighter plane collided with the B-47 bomber carrying the large weapon.
The Pee Dee is a region in the northeast corner of the U.S. state of South Carolina. It lies along the lower watershed of the Pee Dee River, which was named after the Pee Dee, an Indigenous tribe historically inhabiting the region.
The Mk/B53 was a high-yield bunker buster thermonuclear weapon developed by the United States during the Cold War. Deployed on Strategic Air Command bombers, the B53, with a yield of 9 megatons, was the most powerful weapon in the U.S. nuclear arsenal after the last B41 nuclear bombs were retired in 1976.
Wassaw Sound is a bay of the Atlantic Ocean on the coast of Georgia, United States near Savannah at the mouth of the Wilmington River.
Pumpkin bombs were conventional aerial bombs developed by the Manhattan Project and used by the United States Army Air Forces against Japan during World War II. It was a close replication of the Fat Man plutonium bomb with the same ballistic and handling characteristics, but it used non-nuclear conventional high explosives. It was mainly used for testing and training purposes, which included combat missions flown with pumpkin bombs by the 509th Composite Group. The name "pumpkin bomb" was the term used in official documents from the large, fat ellipsoidal shape of the munition casing instead of the more usual cylindrical shape of other bombs, intended to enclose the Fat Man's spherical "physics package".
The 1961 Goldsboro B-52 crash was an accident that occurred near Goldsboro, North Carolina, United States, on 24 January 1961. A Boeing B-52 Stratofortress carrying two 3.8-megaton Mark 39 nuclear bombs broke up in mid-air, dropping its nuclear payload in the process. The pilot in command, Walter Scott Tulloch, ordered the crew to eject at 9,000 ft (2,700 m). Five crewmen successfully ejected or bailed out of the aircraft and landed safely; another ejected, but did not survive the landing, and two died in the crash. Information declassified since 2013 has shown that one of the bombs was judged by nuclear weapons engineers at the time to have been only one safety switch away from detonation, and that it was "credible" to imagine conditions under which it could have detonated.
The CSS Peedee, also known as the CSS Pee Dee was a Confederate gunboat launched in January 1865 and scuttled the following month during the American Civil War.
Project Camel encompassed the work performed by the California Institute of Technology (Caltech) in support of the Manhattan Project during World War II. These activities included the development of detonators and other equipment, testing of bomb shapes dropped from Boeing B-29 Superfortress bombers, and the Salt Wells Pilot Plant, where explosive components of nuclear weapons were manufactured.
The 1958 Mars Bluff B-47 nuclear weapon loss incident was the inadvertent release of a nuclear weapon from a United States Air Force B-47 bomber over Mars Bluff, South Carolina. The bomb, which did not have its fissile nuclear core installed at the time of the accident, impacted with the ground, and its conventional high explosives detonated. The explosion injured six people and caused damage to several buildings in the area. The Air Force was sued by the family of the victims, who received US$54,000, equivalent to $570,270 in 2023.
Operation Snow Flurry was an operation by the United States Air Force that consisted of B-47 Stratojet bombers flying from South Carolina to England to perform mock bomb drops. Data would be received on the ground from the planes, and this would later be used to track the accuracy of the mock drops. Aircraft involved would then fly to Strategic Air Command airfields in North Africa. In 1958, a B-47 en route from Hunter Air Force Base accidentally dropped a Mark 6 nuclear bomb over Mars Bluff, South Carolina, which was not nuclear-armed but there was a conventional explosives detonation which damaged nearby buildings. Live bombs were carried on board in case the planes had to activate for a wartime situation, but had their fissile nuclear cores removed and could not cause a nuclear detonation.
