The US official reiterated an appeal for Iran to release American citizens Baquer Namazi, his son Siamak Namazi and conservationist Morad Tahbaz.
U.S. President Donald Trump holds up a proclamation declaring his intention to withdraw from the JCPOA Iran nuclear agreement after signing it in the Diplomatic Room at the White House in Washington(photo credit: REUTERS/JONATHAN ERNST)ByREUTERS