39th Bombardment Group B-29 Superfortress dropping 500 pound high-explosive bombs over Japan.   Note the high winds in the jet stream scattering the bombs, making precision bombing ineffective from high altitudes
United States Army Air Forces
1945
Birdsall, Stephen (1980), Superfortress, the Boeing B-29 - Aircraft Specials series, Squadron/Signal Publications; 1st edition, ISBN-10: 0897471040, Image source listed as United States Air Force