Atomic bomb

Distance view of the crowd at the Harry S. Truman Library listening to Paul W. Tibbets, Jr., the pilot of the airplane that dropped the atomic bomb on Hiroshima. He spoke at the Harry S. Truman Appreciation Society program. Paul W. Tibbets, Jr. is visible in the center of the photo. Others are unidentified. Donor: Ed Ireland.

Sons of the American Revolution in flag raising ceremony at the Harry S. Truman Library. The ceremony is the Harry S. Truman Appreciation Society program featuring Paul W. Tibbets, Jr., the pilot who flew the airplane that dropped the atomic bomb on Hiroshima. Donor: Ed Ireland.

The Sons of the American Revolution raise the flag at the Harry S. Truman Library for the Harry S. Truman Appreciation Society program, which featured Paul W. Tibbets, Jr., the pilot of the airplane that dropped the bomb on Hiroshima. Military men from Whiteman Air Force Base stand at attention. Donor: Ed Ireland. Donor: Ed Ireland.

The Sons of the American Revolution raise the flag at the Harry S. Truman Appreciation Society program, which featured Paul W. Tibbets, Jr., the pilot of the airplane that dropped the bomb on Hiroshima. Military men from Whiteman Air Force Base stand at attention. Donor: Ed Ireland.

Sons of the American Revolution march in a flag parade in the driveway of the Harry S. Truman Library for the Harry S. Truman Appreciation Society program featuring Paul W. Tibbets, Jr., who dropped the atomic bomb on Hiroshima. Donor: Ed Ireland.

Sons of the American Revolution and members of Whiteman Air Force Base raise the flag for the Harry S. Truman Appreciation Society program at the Harry S. Truman Library. Speaker was Paul W. Tibbets, Jr., who dropped the atomic bomb on Hiroshima. Donor: Ed Ireland.

The experimental prototype of an atomic bomb called the Gadget waits at the base of the Trinity test tower near Alamogordo, New Mexico, before it lifted into firing position and successfully tested.

General Leslie R. Groves and Dr. J. Robert Oppenheimer lean over a desk and glance up from a file of paperwork. A wall-sized map showing the Arctic Ocean is behind them.

Three leading physicists (L-R), Ernest O. Lawrence, Enrico Fermi, and Isidor I. Rabi, gather at Los Alamos National Laboratory during their work on the atomic bomb (Manhattan Project).

The first successful test of an atomic bomb, Alamogordo, New Mexico, taken by an engineer who assisted on the test.