The service's B-2A aircraft entered service in the 1990s, its B-1B aircraft in the 1980s and its current <answer>B-52H</answer> aircraft in the early 1960s. The B-52 Stratofortress airframe design is over 60 years old and the <answer>B-52H</answer> aircraft currently in the active inventory were all built between 1960 and 1962. The <answer>B-52H</answer> is scheduled to remain in service for another 30 years, which would keep the airframe in service for nearly 90 years, an unprecedented length of service for any aircraft. The B-21 is projected to replace the B-52 and parts of the B-1B force by the mid-2020s.
What aircraft in the USAF was introduced in the 1960s?
B-52H