"White House warns Syria not to prepare another Chemical weapon attack" PBS NewsHour 6/27/2017

Excerpt

SUMMARY:  The Trump administration delivered a new stark warning about the use of chemical weapons to the Syrian government of President Bashar al-Assad, saying the U.S. had detected "potential preparations” to use the banned weapons again; an April chemical attack that killed dozens of people prompted the U.S. to fire missiles at an air base.  Chief foreign affairs correspondent Margaret Warner reports.