During the Vietnam War, existence could come down to a single factor. If the Huey helicopters come, you live. If they don’t, you die. In countless nightmarish situations the sound of one’s ...

They include five hot shot crews, 12 engines of different types, nine water tenders and four helicopters equipped to drop water or fire retardant.

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Image Credit: Master Sgt. William Greer, U.S. Air Force - Flickr, Public Domain/Wiki Commons.

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