[quote] One in particular being how cortana was able to teleport chief in the first halo but seems to have forgotten how to do it in the sequels.[/quote][i]There's a teleportation grid that runs throughout Halo. That's how the Monitor moves about so quickly. I learned how to tap into the grid when I was in the Control Room. Unfortunately, each jump requires a rather consequential expenditure of energy. But I'm pretty sure I can take the needed energy from your suit without permanently damaging your shields; needless to say, I think we should only try this once." -Cutscene, Two Betrayals, Halo: CE[/i]