Originally Posted by doober

WBI cannot see a tampon. I am of the opinion that it also cannot a regular pad (perhaps it could see parts of a maxi pad but certainly not a small pad.)

Think about it: When one steps into the WBI one has to raise one's arms in the air. Why? To see under the armpit and inside of the arm. However, one is not told to assume a very wide stance and/or squat so that the WBI can "see" into the crotch. Therefore, something small in the crotch cannot be detected. Further, if one contracts one's pelvic muscles while in the WBI one is further hiding whatever might be in the crotch.

This is why most security experts are qualifying their statements re WBI and the Christmas terrorist: WBI might have stopped the attempt.