nbclx November 10, 2021 1:03 am An Expert Explains the Crowd Surge Tragedy at Astroworld Gil Fried, a crowd management expert and professor at the University of West Florida, breaks down how things went so wrong with Astroworld. US & World Videos 0:35 Boston will have plenty of sun, warm air Thursday 0:45 Karen Read trial Day 3: Witness testimony resumes 1:56 Campus unrest continues at Boston schools 2:44 Weather forecast: It'll feel like summer in our region 2:11 Pro-Palestinian protests continue at local colleges