untouched. it s not really helpful for her. i think, again, it s becoming a huger controversy. the numbers keep going up. today just 40 minutes ago we are at 305 potential classified e-mails. got to wrap it there, thanks. so we now know how much the tsa spent on controversial body scanners. price tag? $160 million for equipment that some investigations later revealed failed to prevent security threats. trace gallagher is live with more on this. is that what it is? this body scanner technology has been the back bone of check point screening processes and the country has invested hundreds of millions of taxpayer dollars and various body scanning machines. we spent $40 million on naked scanner machines. they had to be pulled out of service because of health concerns not to mention the detailed images of travelers
one security expert said there s no guarantee that body scanners would have caught the device. we re dealing with a dynamic adversary here who based their actions in part on our actions. it s not static. so they are going to try to always identify the vulnerabilities and the work-arounds in our own systems. reporter: and it s unclear how many airports abroad have the body scanner technology. keep in mind this was overseas. so we also need to recognize that some of the same standards that may be in place in the united states may not be met in other countries. reporter: almost all airports also use bomb-sniffing dogs and random trace detection like swabbing hands and bags for explosive residues. security officials have been privately concerned the terrorists are constantly changing the chemicals used to create explosives. possibly beating those tactics. the one thing that is clear is that al qaeda remains focused on bringing down a u.s. plane. intelligence officials say this is a