it had to do with a radar trying to keep track of where the csm was and that kind of thing. so when it came to ascent, there was quite a few crew checklist changes that had to be made to take into account that potential problem again showing up possibly on ascent. we did not want that to happen. we wanted to keep those alarms from happening. so one of the changes were made that we just came up with a procedure to stow the antenna and to power off the rendezvous radar during ascent. there was another issue that i remember working when they came back in from their eva, buzz noted the circuit breaker panels -- there are circuit breaker panels on both sides of the lunar module on the inside. it's not like in a house where you flip it like a light switch. you push in and pull out. well, these circuit breakers, most of them were already out, in the off position. and he noticed once he got back into the lunar module a circuit breaker was broken off. it happened to be the ascent engine arm circuit breaker. okay? that doesn't mean we're not going to be able to light the ascent engine

none of us -- i didn't figure it out at the time, but later on they got a little nervous because the csm hatch also was subjected to the same pressure wave but it was a tougher, heavier duty hatch, fortunately. that's that story. that was apollo 14. >> if i remember on apollo 11, ev even, when they were ready to go out and do the space walk, you open a dump valve to dutch the pressure out into the limb so you could open the door and that door was a very large door. and i remember they had a lot of difficulty opening the door because they had the weight of the delta pressure across the door went to absolutely zero before theblingd actually open the door. >> last question. >> i think that's about a 36-inch door. multiply, get nine square feet, so many square inches, multiply it by five. you find out it takes a lot of effort to open the door. and you don't have very good mechanics. >> >> last question. ma'am, i'm sorry? >> what differences in the apollo era compared to the upcoming projects when those lunar modules are landing? what are the major differences you identify between the apollo