Secret Atomic Bomb Test Succesfully

Types of Nuclear Tests
Nuclear explosions have been detonated in all environments: above ground, underground and underwater. Bombs have been detonated on top of towers, onboard barges, suspended from iballoons, on the earth's surface, underwater to depths of 600m, underground to depths of more than 2,400m and in horizontal tunnels. Test bombs have been dropped by aircraft and fired by rockets up to 200 miles into the atmosphere.

Atmospheric testing
Atmospheric testing refers to explosions which take place in or above the atmosphere.

All told, of the over 2,000 nuclear explosions detonated worldwide between 1945 and 1996, 25 % or over 500 bombs were exploded in the atmosphere: over 200 by the United States, over 200 by the Soviet Union, about 20 by Britain, about 50 by France and over 20 by China.