It turns out we were baring all for nothing. The TSA's controversial "naked" X-ray scanners — and their replacements now in place in national airports — cost $160 million, according to figures obtained by Politico. Which would be fine, perhaps, if they worked: In a recent security audit, the TSA failed to find fake explosives and weapons in 96 percent of their tests. "These things weren't even catching metal," the top Democrat on the House's Homeland Security Committee, Rep.