People are reflected in window as they walk on a sidewalk in Tehran, Iran October 14, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS

A man takes a selfie in front of an anti-aircraft weapon on display at Baharestan Square in Tehran, Iran September 27, 2017. Picture taken September 27, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.

A man walks past an anti-U.S. mural in Tehran, Iran October 13, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.

An Iranian man poses for a photo in Tehran, Iran October 13, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.

Men read newspapers and magazine headlines in Tehran, Iran October 14, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.

Image used for illustrative purposes. A money changer holds U.S. dollar banknotes as he counts other currency banknotes at Grand Bazaar in Tehran, Iran October 14, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.

University student, Melika Tavakkoli, poses for a photo in Tehran, Iran October 13, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.

A man displays a picture of U.S. President Donald Trump on his phone in Tehran, Iran October 13, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.

People walk on a sidewalk in Tehran, Iran, October 13, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.

A newspaper featuring a picture of U.S. President Donald Trump is seen in Tehran, Iran, October 14, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS .

A man holds a newspaper as he walks on a sidewalk in Tehran, Iran October 14, 2017. Nazanin Tabatabaee Yazdi/TIMA via REUTERS.