Remember to keep OOC stuff here as Jemal asked....
Binder:
10 MPH is the move-action speed for the Speed power at rank 1, which Bob has. That's 100 feet in a move action (at least by the simple calculation given in M&M; the precise one requires a calculator). 200 in a double-move/accelerated move, 400 in an all-out move (in a straight line). Normal humans move around 3 MPH.
Bob is taking 1 move action if that's enough, or 2 if necessary. I think covering 200 feet will be enough, but I have no idea where we entered the school from or where the gym is in relation to that. We did see what hall the two fleeing terrorists came from, so it's possible Bob will find his way to the right area this round....