Mobile Suit Gundam: The Origin - Advent of the Red Comet

What was the tragedy that decided the fates of Char Aznable, the man later nicknamed the "Red Comet" as an ace pilot of the Zeon forces, and his sister Sayla Mass? The two siblings' journeys, brought on by the sudden death of their father Zeon Zum Deikun who was a leader of the Spacenoids, are depic