(Reuters) - U.S. Defense Secretary Chuck Hagel resigned on Monday, leaving under pressure as President Barack Obama faces critical national security challenges, including fighting Islamic State in Iraq and Syria and revising plans to exit Afghanistan . It was the first...

(Reuters) - Islamic State insurgents battled Iraqi forces in the center of Baiji on Tuesday, a week after the army broke their prolonged siege of the country's largest oil refinery just outside the town, an army officer and residents said. The renewed fighting in Baiji by the...

(Reuters) - Tunisian secularist leader Beji Caid Essebsi beat incumbent President Moncef Marzouki in the first round of landmark presidential elections, but the two men will have to meet again in a December run-off, early results showed on Tuesday. Essebsi, from the Nidaa...

Iranian President Hassan Rouhani has expressed Tehran's commitment to continue nuclear talks with the major powers to reach a final settlement over Iran’s nuclear enrichment program. In comments made late Monday during a live televised address on state television,...