John Glenn, the first American to orbit earth underwent a successful heart surgery. He is said to be recovering well at his home in Columbus, Ohio after his heart valve replacement surgery.

The 92-year-old is recovering well from a surgery that involved a minimally invasive version of the valve replacement procedure done at the Cleveland Clinic in May.

Hank Wilson, a spokesman for the John Glenn School of Public Affairs at OSU, said, "He is fine, he is recuperating well and is in good spirits and in great shape. Everything went well. He's well".

John Glenn is the last surviving of the original seven U.S. Astronauts from "Project Mercury".

On February 20, 1962, he became the first American to orbit the earth. He had set a record that time by circling earth three times in just less than five hours. "Roger, the clock is operating, we're underway", Glenn radioed to Earth at the start of this journey of his.

A phrase "Zero G, and I feel fine" is something that he has repeated throughout his life.

Glenn, a veteran of World War-II and the Korean War, which he fought as a fighter pilot, will be celebrating his 93rd birthday on July 18. Later in life he became a test pilot and an astronaut.

Also, he served the U.S. Senate from 1974-1999. After spending more than two decades as a U.S. senator, he returned to space again at the age of 77 aboard the space shuttle Discovery.