OK, so Griffin jumps the invisible man or Susan into the white house. They (Invisible man and Susan) gather all the intel they need (The places they will put the VIP's away in), pics of it and shit, THEN the hostage taking begins. When the VIP's are moved, the jumpers know where they will be moved to. It's too easy, man. And if they cannot gather the intel, they simply accompany the VIP's to their hideout (cuz they are invisible and shit), then somehow contact the jumpers to let them know where it is.