Tweet purportedly from gunman in Pensacola Navy base shooting suggests al Qaeda inspiration

(CNN) — Much remains unknown about the Royal Saudi Air Force officer who attacked Naval Air Station Pensacola in Florida on Friday morning.

Over the weekend, US officials stressed that the investigation is in its early phases, and that they were working to determine the gunman’s motive. “We don’t know yet if he was acting alone. The FBI is investigating, and...