kiss between two men on this day six years ago is reportedly what led twisted Orlando shooter Oman Mateen to massacre 49 people in a gay nightclub.

On June 12, 2016, the 29-year-old stormed Pulse nightclub in Florida and opened fire in what was the deadliest mass shooting by a single gunman in US history until the 2017 Las Vegas attack.

Mateen was shot dead by police at the scene following a three-hour standoff. Although there are several theories as to what his overall motivating factor was, his father suggested that one kiss on the day of the horrific attack may have sparked it.