The father of the man who reportedly shot up an Orlando, Fla., nightclub early Sunday morning claims his son, Omar Mateen, became "very angry" when he saw two men kissing in downtown Miami a few months ago and thinks it may have been part of his son's motivation. At least 50 people were killed and more than 50 injured at Pulse, a gay nightclub in Orlando, overnight. "We are saying we are apologizing for the whole incident," the father said to NBC News on Sunday. "We are not aware of any action he was taking. We are in shock like...