Airport Reference Code. About Airport Reference Codes. The Airport Reference Code (ARC) is a coding system developed by the Federal Aviation Administration to relate airport design criteria to the operational and physical characteristics of the airplane types that will operate at a particular airport. (The ARC is part of design standards established in the FAA Advisory Circular 150/5300-13, Airport Design, June 2008.)
The United States dropped atomic bombs on the Japanese cities of Hiroshima and Nagasaki in August 1945, during the final stage of the Second World War.The two bombings, which killed at least 129,000 people, remain the only use of nuclear weapons for warfare in history.he discovery of nuclear fission by German chemists Otto Hahn and Fritz Strassmann in 1938, and its theoretical explanation by Lise Meitner and Otto Frisch, made the development of an atomic bomb a theoretical possibility.
You probably know Little Boy and Fat Man as the atomic bombs detonated over Hiroshima and Nagasaki, effectively ending WWII. The U.S. rushed headlong into the development of the bombs, trying to actualize the atomic bomb ahead of the Nazis. And we did it.But during the Manhattan Project scientists developed at least four bombsâThin Man, The Gadget, Little Boy and Fat Manâthree of which made it to fruition (The Gadget, Little Boy, and Fat Man) with two actually being used in war (Little Boy and Fat Man).ess than three weeks after the Trinity Test, Little Boy was successfully detonated over Hiroshima on August 6, 1945. Three days later, Fat Man was detonated over Nagasaki, adding atomic weapons to mankindâs arsenal for the first time.