Omar Mateen went to Pulse nightclub hours before shooting

Gunman Omar Mateen entered the Pulse nightclub at least once before he returned to begin the Orlando shooting, investigators told CBS News on Tuesday.CBS News Justice and Homeland Security correspondent Jeff Pegues reported Mateen went into the club and received a wristband, according to law enforcement sources. Mateen left at some point and returned about 2 hours later to begin the attack that left 49 people dead and 53 wounded early on the morning of June 12.After a request for $5 million in F