The video is focusing on one piece of machinery, theHuey helicopter, and the thousands of soldiers who flew in them. This project is helping to heal emotional wounds of those taking part.

"My heart was pounding when I heard the blades at first, when I saw Larry in there. You can't imagine what it's like after 32 years. We've seen some heavy combat," said Len Malick.

It's friends like Len Malick and Larry Castagneto that are being reunited for a documentary called ‘In the Shadow of the Blade,’ a film about Vietnam pilots and their crews who relied on the Huey helicopter and each other in the heat of battle.

"I think it's the most important documentary that’s ever been done. It's us telling the story," said Castagneto.

Friday, the crew landed in Carthage, Mississippi, on their journey across the country, re-uniting vets who are sharing their perspective on the war.

Malick said, "That one year brought us so close together that if our country asked us to go to war we would leave our family and friends and do it all over again."

Castagneto added, "The sound of the blades--the wop, wop, wop--it was the soundtrack of our youth. It's a welcome home."

"To give people an opportunity to get inside and fly again, that’s the magic and allows them to open up," said Patrick Fries.

It also gives a chance to interact with others who lost loved ones in Vietnam, like Kathleen Crow Settlemier of Jackson.

"This is my son David Crow III. He flew in Vietnam. He was with the 48th assault helicopter," said Settlemier.

The documentary is giving Vietnam vets a chance to share their experiences together that went on to shape history.

"You cry because of pain. This is more tears of joy than anything else being with these guys. There were a lot of good things," said Castagneto.

Reunited for one more tour of duty, these veterans say they'll shed a lot of tears along the way, but it will be well worth it, just to be back together again.