US Official: Russia knew Syrian chemical attack was coming

FILE - In his photo April 4, 2017 file photo, provided by the Syrian anti-government activist group Edlib Media Center, which has been authenticated based on its contents and other AP reporting, shows victims of a suspected chemical attack, in the town of Khan Sheikhoun, northern Idlib province, Syria. A senior U.S. official says the U.S. has concluded that Russia knew in advance of Syria's chemical weapons attack last week. FILE - In his photo April 4, 2017 file photo, provided by the Syrian anti-government activist group Edlib Media Center, which has been authenticated based on its contents and other AP reporting, shows victims of a suspected chemical attack, in the town of Khan Sheikhoun, northern Idlib province, Syria. A senior U.S. official says the U.S. has concluded that Russia knew in advance of Syria's chemical weapons attack last week. WASHINGTON (AP) -- The United States has made a preliminary conclusion that Russia knew in advance of Syria's chemical weapons attack last week, but has no proof of Moscow's involvement, a senior U.S. official says.