FILE -In this fie picture taken on Tuesday April 4, 2017, Abdul-Hamid Alyousef, 29, holds his twin babies who were killed during a suspected chemical weapons attack, in Khan Sheikhoun in the northern province of Idlib, Syria. The Syrian government on Tuesday, June 27, 2017 dismissed White House allegations that it was preparing a new chemical weapons attack, as activists reported an airstrike on an Islamic State-run jail in eastern Syria that they said killed more than 40 prisoners. (Alaa Alyousef via AP, File)