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    Vet: Afghanistan was abyss of the unknown

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Vet: Afghanistan was abyss of the unknown

CNN spoke to three Afghanistan veterans about what it was like to serve in the longest war in US history. For more on Afghanistan, see CNN Films' "Legion of Brothers" on Sunday, September 24 at 9 p.m. ET.

Vet: Afghanistan was abyss of the unknown

CNN spoke to three Afghanistan veterans about what it was like to serve in the longest war in US history. For more on Afghanistan, see CNN Films' "Legion of Brothers" on Sunday, September 24 at 9 p.m. ET.