In this photo from March 11, 2012, Free Syrian Army fighters are seen amid smoke from tank shelling during a day of fierce fighting with the government forces in Idlib, north Syria. At least four rebels were killed and several were injured when the tank shell landed. (Associated Press)

Photo by: Rodrigo Abd

In this photo from March 11, 2012, Free Syrian Army fighters are seen amid smoke from tank shelling during a day of fierce fighting with the government forces in Idlib, north Syria. At least four rebels were killed and several were injured when the tank shell landed. (Associated Press)