An out-of-town wife and 3-year-old daughter forced Adam Steck to cancel plans to attend the Route 91 Harvest music festival October 1 with his cousin. No big deal, thought the veteran Las Vegas show producer, until his phone lit up just after 10pm. “I got a text from my company manager at Thunder From Down Under, and I called my cousin as he was walking in,” recalls Steck. “I could actually hear bullets rattling off through his phone, people running down the street. It was just absolute mayhem.”

Read here to find out what entertainment executives and law enforcement officials say about security measures at future concerts and music festivals.