Dramatic video surfaced online this week showing what appears to be the horrific crash of a 747 cargo plane outside Afghanistan's Bagram airfield.
The video came from the dashcam of a U.S. contractor.
So far, CNN has been unable to confirm its authenticity, and we warn you the video is disturbing.
Seven American crew members lost their lives in the crash.
There are questions about whether the plane's cargo contributed to the accident.
CNN's Chris Lawrence reports.