(Reuters) A man armed with an assault rifle and pledging loyalty to Islamic State killed 50 people during a gay pride celebration at a nightclub in Orlando, Florida, early on Sunday in the deadliest mass shooting in U.S. history, a rampage President Barack Obama denounced as an act of terror and hate. Police killed the gunman, Omar Mateen, 29, a New York-born Florida resident and U.S. citizen who was the son of Afghan immigrants and […]