Signs are growing that stretches of Iraq and Syria are morphing into a single battlefield for militants, exacerbating Iraq's slide into renewed deadly ... 

Al-Qaida's leader has tried to end squabbling between the terror network's Syrian and Iraqi branches, ordering the two groups to remain separate after ... 

Here are the latest developments in the Syria crisis: — Austria announces it is withdrawing 377 U.N. peacekeepers from the Golan Heights after Syrian ... 

The leader of the most formidable rebel group in Syria pledged allegiance Wednesday to al-Qaida but distanced himself from a claim that his Islamic ... 

A judge said he found it "stunning" to hear Monday that federal budget woes could delay the start of a terrorism trial for Osama bin Laden's ... 

Al-Qaida's Iraq branch claimed responsibility Monday for the deaths of 51 Syrian soldiers and nine Iraqis killed in a well-planned assault in western ... 

Sulaiman Abu Ghaith, the charismatic al-Qaida spokesman, fundraiser and son-in-law to Osama bin Laden, is likely to have a vast trove of knowledge ... 

A senior al-Qaida leader and member of Osama bin Laden's inner circle was charged Thursday with conspiring to kill Americans in his role as the terror ... 

In their hurry to flee last month, al-Qaida fighters left behind a crucial document: Tucked under a pile of papers and trash is a confidential letter, ... 

Watching the events in Tunisia, where a leading anti-Islamist politician was shot to death this past week, members of Egypt's liberal opposition are ... 

The United States is struggling to confront an uptick in threats from the world's newest jihadist hot spot with limited intelligence and few partners ... 

Iraqi insurgents are trying to capitalize on the rage of anti-government protesters and the instability caused by rising civil unrest, complicating ... 

The brother of al-Qaida leader Ayman al-Zawahri on Wednesday sanctioned violence against the West in retaliation for the French-led campaign against ...