Cadets attend the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets attend the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

 Cadets celebrate during the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets attend the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets celebrate during the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets attend the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets attend the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets toss their hats in the air during the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets toss their hats in the air during the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets attend the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets attend the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)

Cadets celebrate during the graduation ceremony at the United States Military Academy at West Point, New York, the United States, on May 28, 2014. (Xinhua/Wang Lei)