Eight Pratt & Whitney TF33 engines power the U.S. Air Force’s B-52 Stratofortress long-range, heavy bomber that is capable of flying at high subsonic speeds at altitudes up to 50,000 feet. It can carry nuclear or precision guided conventional ordnance with worldwide precision navigation capability. The B-52 can perform strategic attack, close-air support, air interdiction, offensive counter-air and maritime operations. The use of aerial refueling gives the B-52 a range limited only by crew endurance. It has an unrefueled combat range in excess of 8,800 miles.