LIVE: Authorities hold briefing on Charlie Kirk shooting

Watch live coverage as authorities hold a briefing after conservative activist Charlie Kirk was fatally shot during an event he was hosting at Utah Valley University. A manhunt is underway for the shooter. For more context and news coverage of the most important stories of our day, click here: https://www.nbcnews.com » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver ...