The U.S. Air Force has been spotted integrating hypersonic weapons onto the B-1B Lancer, with footage from Edwards Air Force Base released in late April showing Lockheed Martin’s AGM-183A Air-Launched Rapid Response Weapon mounted externally beneath the bomber. The ARRW is a boost-glide weapon that flies at speeds exceeding Mach 5 and was previously only seen on the B-52H. The B-1B can carry up to 75,000 pounds of weapons and exceed Mach 1.2 — t…