It's down there, in the ground. Mostly unwatched and on private land. Big, big thermonuclear device.
From Wikipedia:
The second bomb plunged into a muddy field at around 700 miles per hour (310 m/s) and disintegrated.[4] The tail was discovered about 20 feet (6.1 m) below ground. Much of the bomb was recovered, including the tritium bottle and the plutonium. However, excavation was abandoned due to uncontrollable ground water flooding. Most of the thermonuclear stage, containing uranium, was left in situ. It is estimated to lie around 55 feet (17 m) below the surface. The Air Force purchased the land to prevent interference with the nuclear remnants.