At least 50 Americans have joined the mix of extremist groups in Syria, warning that some could try to mount terrorist attacks at home, US intelligence officials say.
The director of the US Federal Bureau of Investigation (FBI) says he is concerned that Americans going to Syria to fight against the Syrian government would be radicalized after returning to the US.
An American man from North Carolina is facing federal charges that he sought to join an al Qaeda-linked militant group fighting against Syrian government.
A businessman says he tipped-off the FBI about the whereabouts of Osama bin Laden's secret compound in 2003 and was surprised why they didn't act until 2011.
A former FBI explosives expert has been charged with leaking the classified information about an upgraded underwear bomb involved in a foiled terrorist plot in Yemen.
A mass shooting at a Chicago park left a 3-year-old boy in critical condition and returned the spotlight to gun violence in the city with the nation's highest number of homicides.
The United States’ Federal Bureau of Investigations (FBI) is keeping Syrian Americans under surveillance fearing retaliatory attacks inside the US following the White House’s decision to strike Syria.
A US court has given a verdict of 25 years in prison for a 78-year-old Muslim almsgiver after he was allegedly convicted of terrorism support-related charges based on evidence recorded during his phone conversations.
Moscow has stressed National Security Agency (NSA) Whistleblower Edward Snowden will not be extradited to the US.
US intelligence services are spying on the European Union mission in New York and its embassy in Washington, according to the latest top secret US National Security Agency documents leaked by the whistleblower Edward Snowden.