USS Wasp (LHD 1) (rear) marches on the Hudson River during the 25th Fleet Week in New York, May 23, 2012. The annual Fleet Week was opened on Wednesday, with over 20 fleets from 13 countries attending the fleet march. (Xinhua/Wang Can

　　A United States Navy`s helicopter flies over the Hudson River during the 25th Fleet Week in New York, May 23, 2012. The annual Fleet Week was opened on Wednesday, with over 20 fleets from 13 countries attending the fleet march. (Xinhua/Shen Hong)

　　USS Mitscher (DDG-57) marches on the Hudson River during the 25th Fleet Week in New York, May 23, 2012. The annual Fleet Week was opened on Wednesday, with over 20 fleets from 13 countries attending the fleet march. (Xinhua/Shen Hong)

　　U.S. marine soldiers stand on the USS Wasp (LHD 1) as it marches on the Hudson River during the 25th Fleet Week in New York, May 23, 2012. The annual Fleet Week was opened on Wednesday, with over 20 fleets from 13 countries attending the fleet march. (Xinhua/Shen Hong)