. >> we're not just relying on this instrument soully. but we're looking at the number of different approaches they would like the transportation secretary to put us all in. >> reporter: the scanners only take images front and back. >> they are drawn with great colors placed on the backside. >> reporter: any threats are black too. so the 27-year-old jonathan corbitt sewed a pocket on his side. >> the heavy metal carrying case. >> reporter: and was able to slip right through security. >> and i exit with the object without any complaints from the tsa. >> reporter: we wanted to see if we could replicate what the blogger found. so i took some keys, put them in the sun glass case, zipped it up, putting it right at the side of my body and then walked through. >> feet inside the blue square please. >> reporter: the pentagon scanner had no trouble picking up mine. >> there was a sun glass case clipped on the side of the individual's right pocket. luckily it did not show me naked. >> no security system is 100% perfect. we would abide it if it exis