My simulation involved a total of 6 missions, 4 lunar missions, one pad abort test and one in flight abort test. The lunar missions obviously involve going to the moon, and landing people on it, then returning them to the surface of this planet. The pad abort and in flight abort test both are tests of the launch escape system. The pad abort is the simpler one of just testing in case of emergency during the launch sequence, the second one tests an abort for an emergency once the vehicle has left the pad and the ascent sequence is in progress.