More stuff was FedExed, and Olivia made a foray into the apartment building and planted a device behind a radiator in the corridor just outside of Jones’s apartment. She was not privy to details, but she gathered that this somehow made it easier to sort out the terrorists’ bits from the hackers’ bits. Then MI6 flew in a signals intelligence boffin, using the name Alastair and pretending to be one of Xinyou Quality Control’s clients. Alastair and Olivia held lengthy "meetings" in the office, during which Alastair tweaked the equipment that was already there and installed a new box: a system for bouncing invisible lasers off the windowpanes of Apartment 505. Any sound inside the apartment would cause the windows to vibrate slightly, and the laser rig could pick up the vibrations and translate them back into surprisingly intelligible sound recordings. He also hooked up an automated video recording system that would turn on whenever movement was detected; that is, whenever the terrorists (for there was absolutely no doubt, now, that they were terrorists) opened a window.