The guards took a drop of blood from each of the three of them, pricked from the tip of their ringers. The blood soaked into a strip of paper and into a scanner mounted next to the door. While the scanner checked their DNA with the files on record, the guards searched each of them for weapons. The search was a formality only because they had already been scanned by the SQUID that Ryan had noticed in the hallway. The SQUID was a quantum interference device, and it would have picked up any weapons and any cyberware.