'Tsar' is the largest nuclear bomb ever tested
The 'Tsar Bomba' was tested on October 30, 1961 and is the most powerful nuclear bomb ever detonated. Developed by the Soviet Union as RDS-220, the 50-megaton hydrogen bomb was detonated in an island of the Arctic Sea. Visible from 600 miles away and capable of destroying everything within a 15-mile radius, it could deliver third-degree burns within a 64-mile radius.