The Pentagon says there were no U.S. military deaths in Afghanistan in March. The Associated Press is reporting that it was the first zero-fatality month there since January 2007. American casualties in Afghanistan have declined as the number of U.S. forces has grown smaller and their role has shifted away from combat. U.S. troops are focused on training and advising Afghan forces. The Pentagon says there are about 33,000 U.S. troops in Afghanistan, down from a 2011 peak of about 100,000.