staying out longer left them exposed to the moon elements. every minute they spent outside involved risk as they soon discovered with the lunar rover. >> he hooked the hammer on the fender and broke it off and the dust was raining down on you and the equipment and everything like that. >> and on the moon dust squalls disaster. >> dust affects the thermal absorption of your suit and you get warmer. you use up the cooling water faster. >> in the direct sunlight the temperature of the moon's surface rises well above the boiling point. >> it took some time, but we clamped a new o dust flap made of taped together photographs that worked extremely well for the rest of the mission. needless to say we were honorary members of many automotive repair associations. >> you had a couple of close calls there. you got dust on your spacesuit and could have burnt up. >> when you leave the earth you put yourself in a new environment of risk. people said you had a lot of guts. i didn't have guts. i knew what i was doing. i didn't go to the moon not to come back. >> and soon enough it was time to come back, but not before