>> everybody out. >> okay. battalion 1 to division 1. >> we walk and we walk and we walk. there are maydays being given, and we start to figure out, okay, it's much worse than we think. you can't have that many maydays and that dust and that noise. >> mayday, mayday, mayday. >> whoa. >> hey, hey! >> that's when i saw the danger for the first time. it was all around you. every single cell of your body