Martin Nesirky, spokesperson for the United Nations Secretary-General, speaks during a press conference at the UN headquarters in New York, on Aug. 31, 2013. Nesirky said here Saturday that UN inspectors have conducted "a wide range of fact-finding activities" at a site outside the Syrian capital of Damascus, where alleged chemical weapons attacks killed hundreds of people.(Xinhua/Niu Xiaolei)

Martin Nesirky, spokesperson for the United Nations Secretary-General, speaks during a press conference at the UN headquarters in New York, on Aug. 31, 2013. Nesirky said here Saturday that UN inspectors have conducted "a wide range of fact-finding activities" at a site outside the Syrian capital of Damascus, where alleged chemical weapons attacks killed hundreds of people.(Xinhua/Niu Xiaolei)

Martin Nesirky, spokesperson for the United Nations Secretary-General, speaks during a press conference at the UN headquarters in New York, on Aug. 31, 2013. Nesirky said here Saturday that UN inspectors have conducted "a wide range of fact-finding activities" at a site outside the Syrian capital of Damascus, where alleged chemical weapons attacks killed hundreds of people.(Xinhua/Niu Xiaolei)

Martin Nesirky, spokesperson for the United Nations Secretary-General, speaks during a press conference at the UN headquarters in New York, on Aug. 31, 2013. Nesirky said here Saturday that UN inspectors have conducted "a wide range of fact-finding activities" at a site outside the Syrian capital of Damascus, where alleged chemical weapons attacks killed hundreds of people.(Xinhua/Niu Xiaolei)

Martin Nesirky, spokesperson for the United Nations Secretary-General, speaks during a press conference at the UN headquarters in New York, on Aug. 31, 2013. Nesirky said here Saturday that UN inspectors have conducted "a wide range of fact-finding activities" at a site outside the Syrian capital of Damascus, where alleged chemical weapons attacks killed hundreds of people.(Xinhua/Niu Xiaolei)