A joint investigation by NPR, Texas Public Radio and the program 1A finds that more than 250 workers have died in trench cave-ins over the last decade. Deaths that were preventable, experts say.

YAVORIV, Ukraine--The Troopers of 6th Squadron, 8th Cavalry Regiment, 2nd Infantry Brigade Combat Team, 3rd Infantry Division worked with Soldiers assigned to the 1st Battalion, 80th Airmobile ...