v.t. mississippi shipyard. a surveillance camera recorded as williams' crane lost balance and suddenly tipped over. his co-worker, willie horne saw it happen. >> the boom pulled back and it just bounced back all kinda ways and he was just messed up. his head was crushed. that stuff like that, it's just something you just can't forget like that. >> reporter: the accident crushed williams' skull and left him blind. for months before the accident, he had complained about the crane's broken load sensor. v.t. halter re-installed the sensor two days earlier, but the occupational safety and health administration, or osha, later determined it wasn't fully operational. there is a history of serious accidents at v.t. halter. a few years earlier, two workers were killed applying paint thinner inside a tugboat. in this crawlspace, while working with insufficient ventilation and without explosion-proof lights, vapors built up over 600 times the legal limit, igniting in a flash fire. joey pettey barely