Why This Invictus Games Winner Gave Back Her 4th Gold Medal to Prince Harry

The swimming champ also made the prince promise her something.

The 25-year-old swimmer, who is also an active duty Army staff sergeant, said she felt giving the medal back was the only way she could really say thank you to Papworth Hospital staff, who she credits with saving her life.

Prince Harry initially declined to take back the medal, but when Marks approached him again, he accepted.

At the time, Marks had fallen ill after traveling for the 2014 Invictus Games. She had trouble breathing and was admitted to Papworth, where she was eventually put on life support for two weeks and needed a machine to breathe for her.

Despite the setbacks, Marks has always continued swimming.

Today, Marks won gold in all of the four Invictus events she competed in: the 50-meter freestyle, 50-meter backstroke, 50-meter breaststroke and 100-meter freestyle.