TEC
May 1 2009, AP

To screen passengers for swine flu and other contagious diseases, some airports use thermal imaging cameras to see whether travelers have fevers, without having to stick thermometers in their mouths. So how do the cameras work?

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Honolulu:

In a Tuesday, Jan. 13, 2009 file photo, Earl Mostoles, right, helps Arlene Sato to set up her digital receiver for her old analog television, in Honolulu. About a quarter of full-power U.S. TV stations are turning off their analog TV signals Monday and..