MISSOULA, Mont. -

It was a special celebration in Missoula on Thursday as one of the last four surviving veterans of the Doolittle Raid celebrated his 93 birthday.

David Thatcher was one of 80 Doolittle Raiders who risked their lives on a WWII bombing mission on Japan after the attack on Pearl Harbor. This past Veterans Day, Thatcher and the three other living Doolittle Raiders raised their glasses one final time in honor of their pivotal mission.

Thatcher showed NBC Montana his birthday cards and his birthday cake made by his wife. It's a family day.

"We have three granddaughters and three grandsons here, and a son and daughter," said Thatcher.

His house is filled with memories of a rich life -- medals, pictures and memorabilia. Thatcher received a Silver Star for gallantry in action.

"I think it's important to remember and it's getting more popular now. People are finding out about it," said Thatcher.

Only the men there know what it was like. That's why Thatcher has attended more than 40 reunions. He showed NBC Montana a picture from the most recent one, but says there will be no more reunions now.

"We're getting too old to travel and there's not many of us left," said Thatcher.

The reunions might be done, but Thatcher will always remember. But on his birthday, it's about his family and a secret recipe for longevity.

"My wife is a registered nurse, so she's fed me well through the years, and a good healthy life, and I was a letter carrier in Missoula for about 30 years," said Thatcher.

Thatcher shares his birthday with his 20-year-old grandson and they celebrated together.

The spirits company Hennessey will host a toast every year at different Air Force bases around the country on April 18 to remember the Raiders.