U.S. President Barack Obama huddled with Ethiopia's leaders Monday for talks on counterterrorism, human rights and regional security issues, including the crisis in neighboring South Sudan. Obama's visit marks the first visit by a sitting U.S. president to Ethiopia. He arrived at the National Palace in the capital of Addis Ababa for a bilateral meeting with Prime Minister Hailemariam Desalegn, followed by a joint news conference. Later Monday, Obama was to convene a meeting of African leaders on the situation in South Sudan. The world's newest nation has been gripped by civil war for months spurred by a conflict between warring factions in the government.