HALO jumps are used to enter hostile territory undetected when threats to both Airmen and aircraft are expected.
M65 Nuclear Artillery Test
The M65 Atomic Cannon, often called Atomic Annie, was a towed artillery piece built by the United States and capable of firing a nuclear device. It was developed in the early 1950s, at the beginning of the Cold War, and fielded by 1953 in Europe and Korea. The Atomic Cannon, at 280 mm, was the largest nuclear capable mobile artillery piece manufactured. On May 25, 1953, a 280 mm cannon fired an atomic projectile a distance of 7 miles at the Nevada Test Site. Twenty 280 mm cannons were manufactured. None were used in battle.