most of their careers on the Space Shuttle program. They were both working the mission, known as STS-107, the day of Columbia’s scheduled landing, and they were two of the first people to know that something had gone wrong with the shuttle. As soon as there was a sign of failure, both of them got to work on figuring out the cause of the accident. The investigation would keep them at work for many long hours over several months.

So for the first half of 2003, I didn’t see my parents that much. I was a freshman in high school and an only child, so I spent a lot of time home alone as my parents exhausted themselves at work. At the time, I didn’t really consider it strange,(or core) it is attached to the back end of a speaker cone 58 or a diaphragm 68 to spider 72 connection element 74. In each pictured radiator, a central moveable element is suspended by a speaker “surround” (52, 70, 84) which acts as the flexible element between the stationary front of the speaker basket (50, 66, 80) and the speaker moveable element. Because the range of travel available from each spider (62, 72, 88) is less than the range of travel available from the surround (52, 70, 84), as the spider (62, 72, 88) reaches the limit of its travel and stops. The sudden stop in the movement of the spider, due to its full extensions, causes distortions in adjacent components as well as in the pressure