The Air Force has been secretly flying Reaper drones on counterterrorism missions from a remote civilian airport in southern Ethiopia as part of a rapidly expanding U.S.-led proxy war ... in East Africa, U.S. military officials said. The Reapers began flying missions earlier this year over neighboring Somalia. The United States has relied on lethal drone attacks, a burgeoning CIA presence in Mogadishu and small-scale missions carried out by U.S. Special Forces. The Washington Post reported last month that the Obama administration is building a constellation of secret drone bases in the Arabian Peninsula and the Horn of Africa. The location of the Ethiopian base and the fact that it became operational this year, however, have not been previously disclosed. Some bases in the region also have been used to carry out operations ... in Yemen. The U.S. military deploys drones on attack and surveillance missions over Somalia from a number of bases in the region. The Air Force operates a small fleet of Reapers from the Seychelles, a tropical archipelago in the Indian Ocean, about 800 miles from the Somali coast. The U.S. military also operates drones - both armed versions and models used strictly for surveillance - from Djibouti, a tiny African nation that abuts northwest Somalia at the junction of the Red Sea and the Gulf of Aden.