The SpaceX launch of their rocket, Falcon 1, has been scrubbed. According to CEO of Space Explorations, Elon Musk, "an auxiliary liquid oxygen (
LOX![](/images/icons/term)
) fill tank had a manual vent valve incorrectly set to vent. The time it took to correct the problem resulted in significant
LOX![](/images/icons/term)
boiloff and loss of helium, and it was the latter that caused the launch abort."