BAGHDAD, April 20, 2007 – The United States is committed to the success of the fledgling Iraqi government, but not to the indefinite use of American troops to secure Iraq, Defense Secretary Robert M. Gates said here today. “The United States sees Iraq as an important regional ally and a vital partner in the global war on terrorism,” Gates said in a news conference at the Iraq Ministry of Defense, in Baghdad’s heavily fortified International Zone. “Our commitment to Iraq is long-term, but it is not a commitment to have our young men and women patrolling Iraq’s streets open-endedly.”...