Doug McMakin

December 1994, Islamic radicals detonate a gel-type explosive aboard a Philippine Airlines flight over the Pacific.

It blew a hole in the aircraft, but failed to bring the plane down.

292 passengers survived.

Only one was killed.

Now to the story of that mysterious man accused of attempting to blow up an American Airlines jumbo jet with high-powered explosives planted in his shoes.

The so-called underwear bomber, Abdul Muttalib, boarded a U.S.

airliner last Christmas, no questions asked, and nearly blew it up.

All right, Meredith, thanks very much.

If you're traveling by air this holiday weekend, you just may run into this new high-tech device at the security checkpoint of a local airport.

It's called the millimeter wave.

Talk to me about the technology real quickly.

How graphic an image is that person viewing of the person beneath the clothing?

All right, we've got Eric and Kathy here who have volunteered to go through this device for us.

So Eric and Kathy, one at a time, and again, this is screened by someone in another location.

Why don't you head in, okay?