the website posted an open letter to secretary napolitano protesting the measures and clark kent irvinormer inspector general for the department of homeland security in the bush administration. he's now director of the aspen institute's homeland security program, and he sits on an advisory council for secretary napolitano. welcome to you both. kate, let me begin with you. tsa chief john pistol, secretary napolitano say these necessary to deal with thelutely emerging threat that is posed on airlines. what is your response to that? >> well, we don't believe that the body scanners are effective at catching the kind of bombs that terrorists would most likely be using which would be cavity bombs or bombs hidden below one-tenth inch of skin. we're concerned about radiation issues. we feel these measures are absolutely unamerican and too intrusive for the flying public to handle on an ongoing basis. most people have not been through the scanners or the patdowns yet. they're about to find out over the thanksgiving and christmas holiday just how horrifying it is. our group is receiving about a

joining us now, clark kent irvin, the first inspector general to the department of homeland security. he's currently director of the homeland security program. clark, good to see you. >> you, too, drew. >> you were a guy that was overseeing this when they had the task to make air traffic safe for all of us. i'm just going to ask you flat out, should we have been doing this all along or is this completely unnecessary? >> well, i really do which we should have been doing it since 9/11. the fact of the matter is the metal technology that we used at the airport checkpoint since the 1970s do not detect nonmetallic items. they can detect guns and knives. we know that al qaeda continues to probe for weaknesses and it's the best available right now to detect explosives. i think that the tsa has done everything reasonable to minimize the privacy impact and to minimize the radiation ex positi pose sur. i don't think it was manned delled as it should have been. >> what about the selection process? these screeners are for everybody to go through. the pictures are not being shown in these public a