Omar Mateen had reportedly been investigated by the FBI, and pledged allegiance to ISIL in a 911 call before he committed the worst shooting in US history.
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Islamic State news agency claims group is responsible for attack.
Michael Lumpkin believes he’s got a model for future efforts to counter extremism online in real time.
Defense Secretary Ash Carter on Thursday unveiled major proposals that would reform the military's "up or out" promotion system and allow civilian recruiters to bypass the traditional federal hiring process.
New hardware on the balky refueling boom will be tested next month.
Clapper says the 17 intel agencies must “lead by example.”
Administration says proposed provisions would "micromanage" the Pentagon.
Should the sneakers worn by soldiers be made in America?
Future unmanned-human teaming looks a lot like the Predator’s little cousin.
The presumptive Republican nominee tries to draw a contrast between himself and Hillary Clinton, but both of them supported U.S. involvement in both Libya and Iraq