M3 Regan All Terrain Hover Tank

The M3 Regan [sic] All Terrain Hover Tank (commonly abbreviated RATT) is an American hovering tank.

Background
Named after Ronald Reagan, the hover tanks were used by US Military as main battle tanks and capable of passing any terrain due to their hover engines. Two were kept in the Needles ammunition bunker and both were ordered to leave to fight the invaders outside Needles. One managed to leave the bunker, while the other was destroyed by an explosion (possibly Chinese sabotage).

Appearances
An M3 RATT (wrecked) sits rusting in the Needles ammo dump.

Behind the scenes
A Reagan hover tank was described as being encountered in the Wasteland 2 vision document, hinting that functioning tanks would have made an appearance in the game.