Inside the teen takeovers threatening to explode this summer as cities remain on edge: 'Very worried'

A wave of social media-fueled teen takeovers in cities from Chicago to Washington, D.C., is putting officials on alert for a potentially volatile summer. Experts warn that large youth gatherings could strain police, fuel violence and threaten recent public-safety gains. The warning comes after a wave of spring incidents across the country, where large teen crowds organized or amplified online have led to arrests, fights, weapons charges and emergency curfew debates.