Vietnam will return to the United States on Wednesday what it believes are the remains of 25 missing U.S. servicemen in one of the largest ever turnovers, the U.S. Embassy said Tuesday. An embassy statement said the remains will be flown from Vietnam's capital of Hanoi to the U.S. Army Central Identification Laboratory in Hawaii for identification and return to next-of-kin. The turnover would be the fifth since retired Gen. John W. Vessey reached an agreement in Hanoi last August to significantly speed up progress on the issue.