21.   Night after night, the company had been sending up unmanned Hunter drones equipped with infrared cameras to search the Kosovo-Macedonia border for arms smugglers.

22.   On Friday, the FBI released a videotape, made from a helicopter equipped with an infrared camera, that also recorded the conversation about the canisters.

23.   One problem with an infrared camera is that it works only at night.

24.   Or the infrared camera that will track gestures and thereby allow people to fire up specific pieces of hardware by merely pointing at them.

25.   Only an infrared camera can detect the faintest, most distant galaxies.

26.   Other agents sit in camouflaged towers searching for interlopers with infrared cameras.

27.   Some have infrared cameras and all have video cameras, with images sent to rescue workers on the surface through a cable or wirelessly.

28.   Some were equipped with infrared imaging cameras and others were using dogs to help search for signs of life.

29.   The American military provides intelligence to NATO commanders from Army drones with infrared cameras that fly over Macedonia at night.

30.   That will change, of course, as infrared cameras become more common on vehicles, as they surely will.