More evidence has emerged that the U.S. drone war effort has been expanded into the African nation of Somalia. The Washington Post reports a U.S. drone attacked senior members of the Islamist militant group al-Shabab last week. The United States is now carrying out drone strikes in at least six countries: Afghanistan, Pakistan, Libya, Iraq, Yemen and Somalia. Since taking office, President Obama has greatly ramped up the U.S. use of armed drones.