The atomic bomb, more specifically: the discovery of atomic fission.
The latitude of Athens, Greece is 37.983810, and the longitude is 23.727539. Athens, Greece is located at Greece country in the Cities place category with the gps coordinates of 37° 59' 1.7160'' N and 23° 43' 39.1404'' E. Athens, Greece elevation is 72 meters height, that is equal to 236 feet.
The last president of the U.S. to receive an actual formal declaration of war from congress was Franklin Roosevelt. It was for World War 2.
