"Dawn made its closest approach (549 km) to Mars on February 17, 2009 during a successful gravity assist. On this day the spacecraft placed itself in safe mode, resulting in some data acquisition loss. The spacecraft was reported to be back in full operation two days later with no impact to the subsequent mission. The root cause of the event was reported to be a software programming error."
http://en.wikipedia.org/wiki/Dawn_mission
omg, a marslakók egy biztonsági rést kihasználva megfertőzték az űrhajó operációs rendszerét!!!4444 green hat hax0rz