By Cresswell McCoy WATCH RELATED VIDEO Submit ORLANDO, FL - JUNE 19: People attend a memorial service on June 19, 2016 in Orlando, Florida. Thousands of people are expected at the evening event which will feature entertainers, speakers and a candle vigil at sunset. In what is being called the worst mass shooting in American history, Omar Mir Seddique Mateen killed 49 people at the popular gay nightclub early last Sunday. Fifty-three people were wounded in the attack which authorities and community leaders are still trying to come to terms with Advertisement © 2017 HNGN, All rights reserved. Do not reproduce without permission. Advertisement 0 COMMENTS CLOSE COMMENT Get HNGN's Top Stories Newsletter Everyweek You have already subscribed. Thank you.