U.S. Vice President Dick Cheney (L) and Commander Multinational Forces Iraq, Army General David H. Petraeus, answer questions from the press during a visit to Iraq on March 17, 2008. Cheney declared today that the 2003 U.S.-led invasion of Iraq a "successful endeavor," pointing to security and political progress on a visit ahead of the fifth anniversary of the war. REUTERS/Mass Communication Specialist 1st Class Denny C. Cantrell-US Navy/Handout (IRAQ). FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.