in the may time frame, as general hogue was presenting his update brief to the chief and secretary and to the commander of the air combat command, the air force experienced three physiological incidents in the f-22 between the last couple of days of april and the first three days of may, and at that point chose to ground the fleet. it was also at that time that general hogue, based on the investigations that he had run and the tests, primary ground tests and protocols for the ground test of the life support system of the aircraft, it was his recommendation to the chief and secretary that they establish a broad area review team to look at things besides just the f-22 life support system as it is, but rather, how it got -- how it was developed what si led to some of the incidents that perhaps had occurred and also to ensure that we better understood not just the f-22 on board oxygen generation system and life support system, but also to take a look at the other aircraft that use the onboard oxygen generation systems to determine if there were some lessons learned from the f-22 that would

as a result of general hogue's work and our initial look at the data, as well as the design of the flight testing, i would say two things were important here. one, we developed a series of hypotheses, and they could be broken down into two main hypotheses, one for some reason the on board oxygen generation system is not producing enough oxygen for the circumstance that the pilot finds himself in at that moment. so a lack of production, or second, for some reason, the onboard oxygen generation system and the environmental control system that feeds it, the air that it then produces the oxygen from, may be inputting some contaminant that is getting through the onboard oxygen generation system and perhaps denying the pilot of normal function or the ability to absorb oxygen at a normal rate. so those were the two basic hypotheses, each had five, and in one case, six subhypotheses all of which helped us structure testing and ultimately the procedured that we would use to return the aircraft to fly. so we also knew from the statisticians at that time that given the history of physiological incid

hogue and his wife though got warning. they came outside to the backyard. why?here's a valuable commodity out here, a storm cellar heavily fortified and pretty heavy to open up. he and his wife got down there. and that's what saved them. that door is heavy. how were you able to -- you're a strong man. >> just -- you just do it. >> reporter: paul's family didn't have a storm cellar or any basement, and now they are lucky to have their lives. the tornado threw paul out of the house and on to the street. >> and i was laying down there on the curb, and i looked up and saw the house gone. i didn't know what to do, and then neighbors come in and start pulling bricks off and tilting walls up. and everybody started coming out. >> reporter: what kind of injuries did you sustain? >> i got a big gash on the side of the head with a flap laid over and laid open, and they stitched that back up. >> reporter: his grandson had deep cuts, too, after getting buried under appliances. >> that's about where the bathroom was at and that's where he was underneath in the tub and had the

hogue and his wife got warning, they came outside of the house to the backyard, why?se there's a valuable commodity out here, a storm seller, extremely fortified. he and his wife got down there, and that's what saved them. >> that door is heavy. you're a strong man. >> paul lord's family didn't have a storm cellular or any basement and now they're lucky to have their lives. the tornado threw paul out of the house and on to the street. >> when i was laying down there on the curbs and i looked up and saw the house gone, i didn't know what to do. then neighbors started coming over and pulling bricks off. >> reporter: how many injuries did you sustain? >> i got a big gash on the side of my head and they stitched that back up. >> reporter: his grand son had develop cuts too after getting buried in appliances. >> he was underneath in the tub and they had the washer and dryer on top of him. >> he drove himself and his bleeding grandson to the hospital. the lords are getting a helping hand with the cleanup. but searching for keepsakes and sentimental item right side a low pri