An adviser to former President Richard Nixon said military leaders in Iraq are repeating a mistake made in Vietnam by not applying the full force of the military to win the war. "Every asset of the nation must be applied to the conflict to bring about a quick and successful outcome, or don't do it," Alexander Haig said. "We're in the midst of another struggle where it appears to me we haven't learned very much." The comments by Haig, also a Secretary of State under President Ronald Reagan in the 1980s, were made Saturday at a conference examining the Vietnam...