IMAGE Effects of Fire on Apollo 1 Officially designated Apollo/Saturn 204, but more commonly known as Apollo 1, this view of the interior of the Command Module shows the effects of the intense heat of the flash fire which killed the crew during a routine training exercise. While strapped into their seats inside the Command Module atop a Saturn IB Moon rocket, a faulty electrical switch created a spark which ignited the oxygen environment. The speed and intensity of the fire quickly exhausted the oxygen supply inside the crew cabin.