Web Producer: Mike Mardis
Most of us would be thrilled to live to age 90, 100 would be great. But how active would you be?
Probably not as active as Buster Martin. The Englishman became the world's oldest marathoner when he competed in Saturday's London Marathon.
Buster said he's 101 years old. Although, some believe he's still a youngster at only 94.
After retiring he returned to work as a plumber two years ago because he was bored. Martin has been a smoker his whole life and doesn't drink water.