Experts warn of humanitarian and environmental crisis following Ukraine dam breach

Water is pouring through a giant gap in a dam in southern Ukraine. It gave way early Tuesday morning, forcing thousands of people to flee and touching off competing claims about the cause. Ukraine accused the Russians of blowing up the dam. Moscow claimed that Ukrainian shelling caused the rupture. Neither side offered any direct evidence, but the results were catastrophic. Amna Nawaz reports. Stream your PBS favorites with the PBS app: Find more from PBS NewsHour at Subscribe to our YouTube channel: Follow us: TikTok: @pbsnews Twitter: Instagram: Facebook: Subscribe: PBS NewsHour podcasts: Newsletters: