The 'Body Of Proof' forensic medical team in Philadelphia figured out where war veterans were being butchered, thanks to a quarantined bug found among the dumped bodies. A shipment containing such bugs was being kept at Berth 23 at the Port of Philadelphia.
"23" has become my favorite in the numerical sequence that was so prevalent in the TV series 'Lost'. Having first learned of "the Numbers", I naturally gravitated to "42", because of its connection to 'The Hitch-Hiker's Guide To The Galaxy'. But "23" has been used so often since then, and it seems like such a random number, that I'm more impressed in finding that one.