AURORA, Colo.--The Space Force has suspended launches of the United Launch Alliance's (ULA) Vulcan Centaur rocket under the National Security Space Launch (NSSL) program while the service investigates and fixes an "anomaly" related to the Northrop Grumman [NOC] GEM-63XL solid rocket motor (SRM), a service official told reporters here on Wednesday at the Air & Space Forces Association's warfare symposium. ULA is a Boeing [BA]-Lockheed Martin [LMT] joint venture. That anomaly surfaced on Feb. 27 before Vulcan Centaur, in its…