CONCORD, N.H. (AP) - Republican John McCain contrasts images of Woodstock and his years as a Vietnam prisoner of war in a new television ad that pokes fun at Democratic rival Hillary Rodham Clinton. The commercial, set to air on New Hampshire television Thursday, decries a proposal, since scrapped, to spend $1 million for a museum in Bethel, N.Y., site of the August 1969 rock festival. Clinton and her fellow New York senator, Chuck Schumer, had backed the plan. The ad highlights McCain's criticism of excessive Washington spending, reminds voters of the Arizona senator's decorated war record and also shows...