They reached the wall a few seconds later. With a practiced flick of his wrist, Xavi threw a thin black grappling hook to the top of the wall, where it snagged on a joint. They waited and watched the screen as the crab reached the MI; it paused, then began to drill. If it was going to fail, it would be now, when the machine moved from stealth to offense mode. A minute passed in stressful silence, then the grip buzzed again to show the MI had shut down. Alice nodded to Xavi, who was up and over the wall in seconds. She followed like a true Marine.