Hmm...

He didn't have the proper ID, of course. There was little chance he could take on two armed guards, not to mention the possible uprising and riot that could open up in such a crowded area if he did. For the moment, he made as if he was looking for his lost ID tags, buying time to observe the crowd and the guards, while seeming to have a plausible excuse for not proceeding at the moment, while he got an idea of how exactly the operations at the checkpoint normally proceeded, ears pricked for any passing gossip as people came and went.