The U.S. military could hang more weapons under the wings of its F-35 stealth fighters. Lockheed Martin, which assembles the single-engine, radar-evading jets, in early May 2019 revealed a concept for a hypersonic surface-to-air missile that’s compatible with the U.S. Navy’s F-35C. Lockheed for years has been working with the U.S. Air Force and the Defense Advanced Research Projects Agency to develop the Hypersonic Air-breathing Weapon Concept hypersonic missile. “HAWC, which has so far been under development as a land-attack weapon, is set to fly for the first time before the end of the year,” Joe Trevithick