are looking to make shelter and fire, and so these are obvious things and clearly he is not doing that. the most desperate thing he needs to do now is basically evade the police at all costs. he's desperate. >> how long can somebody go without food or water, assuming he is operating under that scenario? >> you know, there is an old saying, three minutes without air, three days without water, and three weeks without food. you know, he has been keeping a high tempo pace that is filled with the adrenaline rush and it has been going on for many, many days. this is exhausting. he is probably not dressed properly or resting properly, and he is deteriorating on all angles here. >> you pointed out thermal imaging, which is one of the technologies from some of the planes flying overhead, thermal imaging is not a perfect