well. chad, pick up what you are seeing, and describe what is going on right now. >> that would be my call, that those were oxygen canisters going down with the men, and exchangeable as well, because you don't put o2 in there but the perfect mix that you want them to breathe when they get to the surface. we are looking at the bins issues and looking at partial pressures which means how much oxygen compared to nitrogen might be down there in the air they are breathing, because clearly it is not surface air although they have been trying to pump down good air to them, this is air that is stale. it is, well, obviously, 2,000 feet down and very humid down there, and the relative humidity being 80% is going to be a slhok as they come to the surface, because this is a desert, and the air at the surface may be 15%, so therefore, they are wearing warm gear even though it is warm when they are down there