John Kerry Challenges Bush Over Iraq War 4 minutes ago Add Top Stories - AP to My Yahoo! By DAVID ESPO, AP Special Correspondent BOSTON - Sen. John Kerry (news - web sites) challenged President Bush (news - web sites) over the war in Iraq (news - web sites) Thursday in the climactic speech of the Democratic National Convention and pledged an administration where "America never goes to war because we want to, we only go to war because we have to." "I defended this country as a young man and I will defend it as president," said the Massachusetts...