and with osha. you know like i said in the coldest terms, our responsibility is to enforce the safety regulations. >> eric brooks is the area director for osha, the occupational safety and health administration. it's the federal agency charged with enforcing health and safety in the workplace. osha only has nine fulltime compliance officers for north dakota and according to some estimates it would take decades for osha to inspect every workplace in the state. >> while we have 9 people assigned to this area's office we have the collective of osha's resources that we draw upon in order to make sure that we can improve and effectively enforce osha's standards. >> i've never seen osha come out >> wait, you've never seen osha at a site in four years? >> no >> everybody knows about osha. and eh but everyone just does the bare minimum to get by you know. >> john was a friend of dustin payne's. john's not his real name. he asked us not to use that. he told us he worked in the oil fields in north dakota for four years and has been on hundreds of well sites. >> when things that happen like what happened to your friend dustin does it make you step back and kind of ugh decide how long you want to do thi

. >> the terrifying accident is caught on camera by an employee of the occupational safety and health administrationfederal agency charged with setting and enforcing workplace standards. pat is on site that day for a scheduled visit. seconds before the collapse, his colleague begins recording the crane, not for work, but for pleasure. >> we were videoing it just to see, and it turned out to be the best evidence we have. >> iron worker jeff kasinski is watching the lift from a man basket, a bucket suspended from a crane inside the stadium. >> you don't go to work expecting, you know -- you don't expect to see one of the most catastrophic accidents we've ever had. >> the retractable roof is the showpiece of the cutting edge baseball stadium, but lifting the preconstructed structure into place isn't easy. it weighs 400 tons. >> you may as well be lifting the world. that's a lot of iron to be lifting at one shot. >> the crane, nicknamed big blue, is the largest in north america at the time. it lifts the roof nearly 200 feet into the air. everything proceeds as planned until -- >> it was loud to the poin