Orlando shooting: Massive vigil held as new details emerge

02:11

One week after the worst mass shooting in U.S. history, thousands turned out for the largest vigil yet held for victims of the Pulse nightclub massacre. Meanwhile, the FBI is preparing to release transcripts of Omar Mateen’s calls with hostage negotiators, along with new information about what the gunman said to police during the rampage. NBC’s Gabe Gutierrez reports from Orlando, Florida. (Run time: 2:11)