Ukraine's president claims that direct Russian intervention in the conflict has tipped the balance in favour of separatist forces
Rogers, chairman of the House Intelligence Committee, said it’s difficult to keep track of all Americans who have trained with ISIS fighters
Three detained Americans spoke to CNN, including one who said his health is failing after 18 months in prison camp
A YouTube video shows a group from Misrata taking over the annex of the embassy
The 16-year-old girl is suspected of trying to join Islamist rebels in Syria
A former NASA scientist answers questions like how best to build a Lego bridge from London to New York.