Police: At least 20 killed, over 100 injured

Stephen Paddock, who sent bullets and terror down on thousands attending a Jason Aldean concert in Las Vegas, had an arsenal in his 32nd-floor hotel room and at his home 80 miles away, officials said.

A gunman perched on the 32nd floor of a Las Vegas casino unleashed a shower of bullets on an outdoor country music festival below, killing at least 58 people and wounding at least 515 in the deadliest mass shooting in modern U.S. history.