From left to right, Iran's President Hassan Rouhani, supreme leader Ayatollah Ali Khamenei, parliament speaker Ali Larijani, and head of Iran's judiciary Ayatollah Sadeq Larijani stand to attention as the national anthem is played during a conference titled "international conference in support of Palestinian Intifada" in Tehran, Iran, Tuesday, Feb. 21, 2017. Iran's supreme leader has used the podium of a pro-Palestinian gathering in Tehran to call Israel a "fake" nation and a "dirty chapter" of history. (AP Photo/Ebrahim Noroozi)