Radiation detectors are already in place all over America, Wired magazine reports. No one will say where.
But private companies and public security officials do acknowledge a three-tiered placement plan. The first tier is obvious: targets missed in the 9/11 attacks. This includes US government buildings like the White House and the Capitol, as well as made-for-TV targets like sports stadiums and Olympic venues. The second tier: bridges and tunnels leading to urban centers and national border crossings. And the third tier? Everything else. "Every proton and neutron out there deserves to be counted," says Jeff Chapman, a former Department of Energy physicist.