Air Force Takes Next Step in Efforts to Ready B-1 for Future Hypersonic Missiles A B-1B Lancer assigned to the 419th Flight Test Squadron, 412th Test Wing, releases a Joint Air-to-Surface Standoff Missile during an external release demonstration in the skies over Holloman Air Force Base, New Mexico, Dec. 4, 2020. (U.S. Air Force/Ethan Wagner) 10 Dec 2020 Weeks after the U.S. Air Force proved it could mount an advanced stealth cruise missile externally on the B-1B Lancer for the first time, it has taken the next step, test-firing an inert missile from under the B-1's fuselage. The 419th Flight Test Squadron out of Edwards Air Force Base, California launched a practice round of the AGM-158 Joint Air-to-Surface Standoff Missile, known as the JASSM, from the bomber, according to a news release. The news of the test, conducted at Holloman Air Force Base, New Mexico, Dec. 4, was first reported by Defense News.