fox's troy hayden was recently able to spend a day on one. >> reporter: uss ohio moves to landing inan diego. still very secret. well guarded. it's dark. it's massive. it's as long as the washington monument is high. nearly the length of two football fields. the sale as it's called stretches high into the area. we get to take you on board. >> all right. here we go. come on. let's check this thing out. >> we climbed down a long narrow hatch, once inside the ohio is surprisingly spacious for a submarine. >> we drop several hundred feet underwater to the first order of business plug into an airline and breathe if something goes wrong. >> make sure you're getting air properly. >> reporter: we arrive at the command control center. the brain of the sub. this is where the para scope is it works just like you see in the movies. if you're looking threw it it's kind of like using high tech binoculars at the surface. young sailors steer the boat and make dive. >> dive, dive! >> reporter: all of these men and women volunteer to be here. very elite operation. >> most if not all the sailors on boa

for more on this case, let's go to arizona and fox 10 and our station fox 10 and troy hayden, a reporter for ksaz. you were there yesterday and one reporter had seen five or six executions and looked like he had seen a ghost, and then they got to you and you just laid it out. explain to us what you saw. >> well, first of all, want to say this is not about joe wood. joe wood was a bad guy. committed a terrible crime. so we're talking about the process of putting him to death and it was tough to watch, took a long time. started off normally. little death house in the back of the prison. a big prison on lock down. we're sitting on benches, shoulder to shoulder, and behind us this old gas chamber. ahead of us is the picture window and curtains are closed. the side of that are individual mow nonner video monitors and there's joe wood. and there are i.v.s in his arm. then the curtain opens up, laying four feet away from me. looking at all the witnesses there. and he goes to sleep. again, everything is going the way it should. about five minutes later -- now, the terns are saying gasping and wh