Transcript for Son of a veteran fulfilled his father's dying wish to be draped in the American flag
Finally tonight, "America strong." A father's final wish. His son stepping up to honor him, two veterans and the flag they both fought for. United them forever. Here's ABC's erielle reshef. Reporter: It was a veteran father's dying wish to be draped in the American flag. But retired army tank commander mark brown didn't want a pristine one. He wanted one that was tattered and rugged and weathered just like he was. Reporter: Asking his son Zack, a retired army sergeant, for a flag with history. Zack, returning home from combat in Iraq with severe PTSD, starting a special nonprofit. I started collecting these flags because even though they're tattered and worn, I still believe they have a mission. And the same thing with veterans, even though they're tattered and worn, you still have a mission. Reporter: Donating those flags to veterans' families. Mark in awe of his son's mission. He would jokingly say, "Will you save one of those tattered flags for me?" And I said, "Of course, dad. I'll save a tattered flag for you." Reporter: And so, Zack honored his father. He was under the red, white and blue. Reporter: With a final embrace and the warn stars and stripes of old glory. I just pictured him looking down on me smiling. Reporter: Erielle reshef, ABC news. So, tonight, we salute the browns for their service and for sharing their story with us. And thank you for watching. I'm Tom llamas in New York. "Good morning America" and "This week" in the morning. I'll see you right back here Seresto, Seresto, Seresto.
This transcript has been automatically generated and may not be 100% accurate.