Despite hours of feverish digging, their bare hands clawing at the dirt, rescue workers could not save two children who were buried by a wall of dirt that collapsed on top of them at a North Carolina home construction site. The bodies of Chloe Jade Arwood, 6, and her cousin James Levi Caldwell, 7, were found at the bottom of a 24-foot-deep pit on Monday morning, more than 12 hours after a wall of the pit collapsed on them behind a family member’s home, authorities said.