The Defense Advanced Research Projects Agency is in discussions with several military organizations to eventually take over its Gremlins drone program, but recent setbacks have delayed any transition to 2023 at the earliest. DARPA still has to validate the drone’s recovery system -- designed to retrieve the vehicle mid-flight from a manned aircraft -- and then begin a new round of tests proving its operational utility. The program has had issues successfully employing the recovery system, including at the most...