Mark Schapiro, “Nuclear [Intelligence] Fallout,” Muckraker blog, 29 Aug ’08): When we were conducting our final reporting back in March, I researched Urs Friedrich Tinner—the one of the three considered most deeply involved in [A. Q.] Khan’s illicit enterprise—through the electronic database Accurint. I was astounded at the time to see that his U.S. address [...]