Officials find no active shooter at Joint Base Andrews

.A law enforcement official said Thursday no active shooter was found at a military post outside Washington, and the base said a lockdown was lifted except for the building where an active shooter had been reported.The law enforcement official was not authorized to discuss the matter by name and spoke on condition of anonymity.Joint Base Andrews tweeted just after 10:30 a.m. Thursday that the lock down had been lifted with the exception of the Malcolm Grow medical center.The base was placed on