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.
   The atomic bomb was not invented in the US or by  Einstein, it was invented in London, England in 1933 by one of  Einstein's friends-Leo Szilard while crossing a street  and patented by him in 1934.s a Jewish-German, Einstein had seen first-hand what the Third Reich was willing to do, and did not want them being the sole owners of atomic weapons.