By Rick HowlettAfghan President Hamid Karzai wrapped up his U.S. trip Friday with a stop at the Fort Campbell Army Base, where he met with troops preparing to deploy to Afghanistan's Kandahar Province. Fort Campbell is sending about 20,000 troops to the region. Karzai has been in the U.S. this week for talks with President Obama.He also visited with wounded U.S. soldiers.(Photo courtesy of Fort Campbell, U.S. Army)