U.S. soldiers in Afghanistan's Wardak province prepare to board a Black Hawk helicopter. The Obama administration is assessing U.S. military strategy in Afghanistan and weighing whether to send tens of thousands more troops. Dima Gavrysh/AP hide caption

itoggle caption Dima Gavrysh/AP

Iran's elite Revolutionary Guards march during a military parade in Tehran in September 2008 to commemorate the 28th anniversary of Iran's 1980-1988 war with Iraq. The semi-independent group has taken quietly taken over dozens of companies in the country. Behrouz Mehri/AFP/Getty Images hide caption

itoggle caption Behrouz Mehri/AFP/Getty Images