Republican and Democratic U.S. lawmakers pressed President Donald Trump on Thursday to impose sanctions on Turkey over its purchase of a Russian missile defense system, saying he should follow a law mandating penalties for doing business with Russia's military.

Four years after Russian warplanes began pummelling opposition groups in Syria, the country’s embattled president Bashar Al Assad is relying on a fresh batch of elite ground troops from Moscow to rout his opponents from their last stronghold, according to senior rebel commanders in northern Idlib province. The Russian special forces are now taking an active role in combat, not just directing fighting from behind front lines and providing sniper or artillery fire, the rebels say. "These special Russian forces are now present in the battlefield. The Russians are intervening directly now," said Naji Mustafa, spokesman for the Turkey-backed National Liberation Front...

Republican Senator Rick Scott plans to unveil a resolution on Thursday calling for sanctions against Turkey after its purchase of a Russian air defense system, increasing pressure on U.S. President Donald Trump to take action against the NATO ally.

Turkish defense companies helping to build F-35 stealth fighter jets are set to lose work worth billions of dollars after Washington said it was removing Turkey from the program over its purchase of a Russian missile defense system.

Wired editor-in-chief Nick Thompson tells CBSN there's little evidence to back up photo fears around Russian-owned app

U.S. President Donald Trump was unclear on Thursday over whether his administration was looking at imposing sanctions on Turkey following its purchase of Russian air defense systems, sparking confusion at a tense time for relations between the two nations.

Citing privacy risks, the Senate minority leader called on the FBI and Federal Trade Commission to probe the viral photo-editing app.

A unit at a Russian nuclear plant was partially shut down on Thursday morning because of a short-circuit in a transformer, but is now back on line, Russia's TASS news agency quoted a representative of the power station as saying.

Senator Chuck Schumer has called for the FBI to investigate the Russian-owned FaceApp for potential privacy or security risks. CBS News' Lisa Mateo reports on the viral app, and CNET senior producer Dan Patterson joins CBSN to explain why lawmakers have raised the alarm.