as night falls, they secure a truck to assess the damage in portauprince. >> it was dark, people are burning tires and stuff on the street just to get some light. >> with them is cameraman thornson, he's filming for a documentary about isar, never imagining scenes like these. >> i cried when i was alone. it moves you, of course. >> there seems to be no end to the suffering. isar veteran is stunned. >> we started seeing bodies being piled up on the sidewalks. >> there's little time to mourn. fearing widespread disease, the government orders all bodies removed from the city. >> you had excavators picking up the bodies and dumping them into dump trucks and they would take them outside the city and buried them in mass graves. this is something i never could have imagined. >> light of day reveals more tragedy as the team drives to their first search location. >> you could see the scale of the disaster. people everywhere, in open spaces, it was a city in ruins. >> one of the largest supermarkets, the caribbean market has collapsed with an estimated 100 people inside. a venezuelan rescue te