Find the value of the missin...Find the value of the missing number.
Correct answers: 80
The first user who solved this task is Fazil Hashim.
First US underground nuclear testIn 1957, the United States conducted its first underground nuclear test, in the Nevada desert, at Area 12 of the Nevada Test Site. The Atomic Energy Commission's (AEC) first fully contained underground nuclear detonation named the Rainier event, detonated in a horizontal tunnel, about 47 meters (1600 feet) into the mesa and 274 meters (900 feet) beneath the top of the mesa.