People wait to donate blood at the Oneblood center on June 13, 2016 in Orlando, Florida. Law enforcement authorities on Monday lowered the death toll from the weekend massacre at a gay nightclub in Orlando to 49, the deadliest mass shooting in American history, explaining that the shooter had been counted in the original tally. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)