From reader Kyle.

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Little Boy

■ This gun-type uranium bomb, nicknamed Little Boy,
weighed 9,700 pounds.
■ The bomb was dropped on Hiroshima, Japan,
August 6, 1945, at 8:15 AM.
■ A B-29 dropped the bomb from 31,000 feet. The bomb exploded
about 1,500 feet above the city with a force of 15,000 tons of TNT.
■ The name of the plane was Enola Gay, named after the pilot’s mother.

■ The pilot, attached to the 509th, was Col. Paul Tibbets. The copilot
was Capt. Robert Lewis.
■ The bomb destroyed 5 square miles of the city and caused about 140,000
deaths by the end of 1945.

Fat Man
■ This implosion-type plutonium bomb,
nicknamed Fat Man, weighed 10,800 pounds.
■ The bomb was dropped on Nagasaki, Japan,
August 9, 1945, at 11:01 AM.
■ The B-29 Bock’s Car (named after Frederick Bock,
who was the usual pilot), dropped the bomb from
29,000 feet. The bomb exploded 1,650 feet above the
slopes of the city with a force of 21,000 tons of TNT.
■ The pilot was Maj. Charles W. Sweeney. The copilot was
Capt. Charles D. Albury.
■ The primary target was Kokura Arsenal, but because of unacceptable weather
conditions and antiaircraft gunfire at Kokura, Maj. Sweeney decided to switch
to his secondary target, Nagasaki.
■ The bomb destroyed 3 square miles of the city and caused about 140,000
deaths by the end of 1945.

https://www.census.gov/history/pdf/fatman-littleboy-losalamosnatllab.pdf