In this image made from video, U.N. vehicles leave the entry area of a hotel after U.N. weapon inspectors get off their vehicles upon their arrival in Damascus, Syria, on Aug. 18, 2013. A team of U.N. weapons inspectors arrived in Damascus on Sunday for a long-delayed mission to investigate the alleged use of chemical arms in Syria's civil war. (Associated Press)

Photo by: Uncredited

In this image made from video, U.N. vehicles leave the entry area of a hotel after U.N. weapon inspectors get off their vehicles upon their arrival in Damascus, Syria, on Aug. 18, 2013. A team of U.N. weapons inspectors arrived in Damascus on Sunday for a long-delayed mission to investigate the alleged use of chemical arms in Syria's civil war. (Associated Press)