Spencer Ackerman writes:
Some people are into spelunking through the urban ruins and crevasses of unfamiliar cities. The National Counterterrorism Center has a term for these sorts of people: terrorist dupes.
“Urban Explorers (UE) — hobbyists who seek illicit access to transportation and industrial facilities in urban areas — frequently post photographs, video footage, and diagrams on line [sic] that could be used by terrorists to remotely identify and surveil potential targets,” warns the nation’s premiere all-source center for counterterrorism analysis. […]
Urban exploration is not typically the reconnaissance mission of al-Qaida. While it’s not crazy to think that terrorists might be interested in studying an urban landscape, the vanishingly few cases of domestic terrorism in the post-9/11 era typically involved shooting up places like Fort Hood or leaving a would-be car bomb in Times Square, rather than recon from the top of a bridge or the depths of a subway tunnel. Such tips aren’t even a part of the DIY terrorism advice column in al-Qaida’s English-language webzine.