Johnson served in the U.S. Air Force for 20 years, fighting during the Korean conflict and Vietnam.
Now at the age of 78, he continues to serve.
He says, "Life is too important. I've learned that there are so many people in this world that need help."
Many people know him as Kooter the clown.
"They call me and say my child is this, this, and this, and so I try to help them to get into the hospitals," says Kooter.
Once a month he travels to Houston Shriners Hospital to take care of children who are in need and entertain them while he's there, something Kooter is extremely passionate about.
"The love of helping children and basically I love to clown and make people smile."
Barney has a true passion for helping people.
In addition to his hospital visits, Barney also delivers meals on wheels, and the recipients are always happy to see him.
Serving just about his entire life, barney says there's no possible way he will stop.
People ask, "Do you think you'll ever just sit down and rest?"
Barney answers, "No. I don't want to. There's always someone, somewhere, that needs help."