In response to an alleged chemical weapons attack by Syria’s government on the Syrian town of Douma, President Donald Trump promised a “forceful” response.  Trump’s threat comes a year after he launched 59 cruise missiles at Syria’s Shayrat Air Base after an April 4, 2017 chemical weapons attack on the town of Khan Sheikhoun, that killed close to 100 people and injured hundreds more. We’ll get analysis from Joshua Landis, director of the Center for Middle East Studies at the University of Oklahoma. He edits the blog Syria Comment. Joining Landis is Chicago-based physician Zaher Sahloul. He believes a lack of accountability has “normalized” the use of chemical weapons. Dr. Sahloul, a critical care specialist, has made numerous trips to his native Syria, since civil war began there seven years ago. He’s personally verified the human suffering caused by chemical and conventional weapons attacks in conflict zones.