The Air Force Research Laboratory had to abort a July 29 flight test of Kratos' XQ-58A Valkyrie after an "anomaly" with the rocket-assisted take-off system -- the drone's second mishap in 10 months. "The incident occurred during morning pre-flight checks and resulted in the aircraft leaving its launcher and quickly coming to rest in front of the launch rails," AFRL spokesman Bryan Ripple said in an email to Inside Defense today. "The unmanned aircraft's rocket system was made safe,...