Former French president Nicolas Sarkozy was one of the most generous donors to US presidential family in 2011
While US and British governments had earlier said Assad regime may have used nerve gas sarin, Obama in no hurry to intervene in Syria.
UK Prime Minister echoes Barack Obama and says use of chemical weapons is "a red line for us to do more."
Senior Obama figure cites intelligence sources that government soldiers used sarin nerve gas on rebels.
Pro-Assad forces hacked AP newswire Twitter account to say President Obama had been injured.
Fake tweet claimed President Obama injured in bomb blasts at White House, raising fresh concerns over Twitter security.
Lethal nerve agent used by Assad's troops against rebels.
As Dzhokhar Tsarnaev lies critical in hospital, initial reports indicate the suspect does not have a terrorist link.
Parents say sons Dzhokhar and Tamerlan Tsarnaev were set up by the FBI, which has admitted interviewing the elder brother in 2011.
Families deserve answers says president, after capture of second suspect Dzhokhar Tsarnaev.
Dzhokhar Tsarnaev and Tamerlan Tsarnaev have Chechen connections, but are they relevant to the bombing?
Dzhokhar Tsarnaev, teenage suspect in Boston marathon bombings, was hiding in a boat parked in a homeowner's backyard in Watertown.
The US House of Representatives has passed the controversial CISPA bill, though it now faces opposition from President Obama and the Senate
Kate Middleton named in Time magazine's 100 Most Influential People in the World list
Two suspects wearing baseball caps were caught on CCTV camera minutes before blasts at finish line of Boston marathon.
The president spoke at interfaith service "Healing our city" in Boston's cathedral of the Holy Cross
Barack Obama has delivered a powerful and inspired speech at an interfaith memorial service in Boston in the aftermath of the twin blast at the Marathon's finish line.
A suspect is held over deadly poison sent to US president and Senator Roger Wicker
Letter received at off-site location away from White House.
British boxing champion stirs controversy by urging fans to 'think of Syria, Pakistan, Iraq, Palestine and all the countries that are bombarded frequently.'
Boston University student's friend Zhou Danling in stable condition following surgery at a Boston Hospital
FBI suspects explosives were placed in nylon bags or backpacks along with ball bearings and nails, which maimed several victims.