Transcript for World War II veterans travel to Normandy hoping for 'closure'
After our broadcast here tonight, we will be traveling to normandy, to mark the 75th anniversary of d-day. For weeks now, we've been traveling across the U.S. To meet World War II veterans who were there that day. They were young sons who would change the course of history, and tonight, right here, you will see the moment many of them meet for the first time, to make that journey back together. It is a journey they never thought they would make. 75 years later, they are returning to normandy. Harold mcmurran, new market, Alabama, and his uniform. I wore part of it during the war. Reporter: And the entry in his diary that fateful morning. June 6th, 1944. Invasion started 7:15 A.M. English time. Reporter: That would be all he wrote for five harrowing days. I didn't have time to do any entries. The next one was the 11th. Reporter: Harold, at 94, drives to airport. He's going back. So is jack Claiborne from dyersburg, Tennessee. This is me sitting there. Reporter: Harold Himmelsbach, raised in Yakima, Washington, and now packing the letters he wrote to his mother just days after d-day. You write, "I'll leave all the bloody details to be written to Leo." Yeah, he's my brother. Reporter: Your brother? I tell him. Reporter: Harold with descriptions of war he thought only a brother should hear. Vincent Unger from Orlando, Florida. This is my baby, my ship. Reporter: Vincent going back, too. Onofrio Zicari, Las Vegas, Nevada. Part of the fifth amphibious brigade on d-day. That's our company patch. We wore this on our shoulders, on our jackets. Reporter: All of them leaving home -- again. I'm on my way to normandy. Reporter: They have yet to meet one another, but they already share a bond. They were all there that morning, June 6th, 1944. The largest amphibious invasion in military history. 50 miles of normandy coastline, the beaches with codenames. Utah, Omaha, gold, juno and sword. And what they did would change the course of the war. Harold Himmelsbach remembers the wakeup at 3:00 A.M. It was not long after. When you looked around and saw all of those ships, did you think, "This is actually happening?" You bet -- yes, I sure did. Reporter: Could you see the It was just a couple thousand yards, you know. Reporter: And then they saw things they will never forget. Harold mcmurran, first infantry division. First, I was afraid, then I was scared, and then I was numb. The medics was overwhelmed, sometimes wounded themselves. They would try to perform, sometimes they would be in worse shape than the men they was trying to take care of. We all had what we called a buddy and we knew that that buddy would give his life for us and vice versa. Reporter: Onofrio Zicari remembers the orders. The officers were saying, "Let's go in, man. We got to --" I can't even get up, for god's sakes. I mean, it was just fire over your heads all the time. Reporter: Vincent Unger, second class signalman in the Navy. The water was from an Orange to a deep red for miles, 20 miles down the coast. Reporter: More than 4,000 allied troops were killed, but their brothers would prevail. When you go back to normandy, I'm sure you'll be thinking of some of those brothers you lost. Yep, yep, that's right. Reporter: What does this trip mean to you? Well, it's my last trip here, I expect, because of my age. I'm 93. I'm almost 94. I'm hoping that going back to normandy gives me closure of some kind. I hope I get out and other people see through my eyes. Reporter: These veterans are aware that at their age, we're now losing more than 300 world War II veterans in the U.S. I'm sure it's getting smaller and smaller. Reporter: Yeah. Which is why we need to remember. That's right. Reporter: Each of these men flying to Atlanta to meet up and then fly together to France. The pilot thanking them before they even board. We can never repay you for the debt that you have paid for us. So thank you very much. We'll start boarding with the veterans first. Thank you. Reporter: One by one. Have a good flight, sir. Thank you. Reporter: Harold mcmurran brought to that plane. Jack Claiborne on board, too. Vincent Unger. And Onofrio Zicari, looking out, the journey ahead. All of them ready. I'm so pleased and excited because I never thought I'd be coming, but here I am, and I'm looking forward to it. And, of course, we will be in normandy with those World War II veterans. I told them I would meet them there and they told us they have plenty they want to show us. That's tomorrow night, and Thursday night, right here.
This transcript has been automatically generated and may not be 100% accurate.