Police are investigating a tragedy at a Houston concert where at least eight people were killed and dozens were injured when a crowd surged forward at the “Astroworld” music festival. NBC’s Morgan Chesky reports. » Subscribe to MSNBC: MSNBC delivers breaking news, in-depth analysis of politics headlines, as well as commentary and informed perspectives. Find video… Continue reading At Least Eight Dead, Dozens Injured After 'Panic' at Houston's 'Astroworld' Music Festival