Team USA synchronized swimming duo Mary Killman and Mariya Koroleva spend hours treading water as part of their intense training for the Olympic Games.

After failing to medal in Beijing, the United States’ synchronized swimming team seeks¬†redemption at the 2012 London Olympics.¬†Killman and Koroleva are the sole American entrants in the duet competition.

Photo by BSU at the Games

Mary Killman and Mariya Koroleva