Green Beret rushes home from Afghanistan for an important mission

Army Special Forces Lt. Col. Trevor Hill became a living donor for his infant nephew.
1:46 | 10/29/17

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Transcript for Green Beret rushes home from Afghanistan for an important mission
Finally tonight, a soldier living with survivors' guilt after a violent attack on the battlefield until he was able to save a life in his own family. Here's Marci Gonzalez. Reporter: Hudson hill, born with that beautiful full head of hair, and a big battle ahead of him. His liver disease, quickly becoming life-threatening. Leaving him in desperate need of a transplant. No parent -- it's scary. Reporter: He needed a living donor, and his uncle, who knows all about putting up a brave fight, was a perfect match. Army special forces lieutenant colonel Trevor hill, rushing back from Afghanistan for a critical mission unlike any other during his five deployments. Including the one in 2005 that nearly took his life. We rolled over, and two of the four people in my vehicle were killed instantly. I was trapped in the overturned vehicle, and it caught fire. Reporter: Other soldiers pulled him from the burning wreckage. Ever since then, I have survivor guilt, and I also have, these guys saved my life and what do I do to pay that back? Reporter: This was his chance. The complex and rare transplant, a success. Hudson, now healthy and celebrating his first birthday. His hero uncle looking ahead to many more. I think we'll always have something special. Reporter: Marci Gonzalez, ABC news. Tonight, we salute Hudson and his uncle for being "America strong." We thank you for watching. I'm Tom llamas in New York. "Gma" frs first thing in the morning.

This transcript has been automatically generated and may not be 100% accurate.

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