Operation Buster-Jangle was a series of seven (six atmospheric, one underground) nuclear weapon

Nuclear weapon

A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from relatively small amounts of matter. The first fission bomb test released the same amount...

s tests conducted by the United States in late 1951 at the Nevada Test Site

Nevada Test Site

The Nevada National Security Site , previously the Nevada Test Site , is a United States Department of Energy reservation located in southeastern Nye County, Nevada, about northwest of the city of Las Vegas...

. Buster-Jangle was the first joint test program between the DOD

United States Department of Defense

The United States Department of Defense is the U.S...

 and Los Alamos

Los Alamos National Laboratory

Los Alamos National Laboratory is a United States Department of Energy national laboratory, managed and operated by Los Alamos National Security , located in Los Alamos, New Mexico...

 National Laboratories. 6,500 troop

Troop

A troop is a military unit, originally a small force of cavalry, subordinate to a squadron and headed by the troop leader. In many armies a troop is the equivalent unit to the infantry section or platoon...

s were involved in the Desert Rock

Desert Rock exercises

Desert Rock was the code name of a series of exercises conducted by the US military in conjunction with atmospheric nuclear tests. They were carried out at the Nevada Proving Grounds between 1951 and 1957....

 I, II, and III exercises in conjunction with the tests. The last two tests evaluated the cratering effects of low-yield nuclear devices.