<human>:  What was the purpose of the B-52?
<bot>: The B-52 was designed to carry nuclear weapons to the Soviet Union during the Cold War. The B-52 was used extensively in the Vietnam War, and was retired from service in the early 1990s. The B-52 was designed to carry a single nuclear weapon, but was also capable of carrying multiple conventional weapons. The B-52 is also known as the Stratofortress.