It's time to send bomb-detecting dogs sniffing up and down lines of passengers at airports, say some security analysts. Dogs may reduce the need for TSA screening that is more invasive of personal privacy.
The TSA announced Wednesday that it will begin random swabbing of passengers' hands to check for signs of explosives.
Critics say that full-body scanners are costly, invasive, and will slow airport security further. The Puffer and the Guardian are alternatives, though not yet fully developed.