Iranians attend a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, or Freedom Tower, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of people poured out onto the streets of Tehran and other cities and towns across Iran, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Vahid Salemi)

An Iranian woman holds up a portrait of Iranian Supreme Leader Ayatollah Ali Khamenei, as she makes the victory sign during a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

An Iranian woman holds an effigy of US president Donald Trump, during a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

An Iranian teenager carries a mock rocket propelled grenade, during a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

An Iranian girl with the Iranian flag painted on her face attends a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

Iranians attend a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

Iranians attend a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

A man holds a portrait of Iranian Supreme Leader Ayatollah Ali Khamenei, during a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

People chant slogans during a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

A man holds a placard that reads in Farsi, "Death to England," during a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

Two boys hold up posters of Iranian Supreme Leader Ayatollah Ali Khamenei, right, and late revolutionary founder Ayatollah Khomeini,left, during a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

Iranian women hold up portraits of Iranian Supreme Leader Ayatollah Ali Khamenei, during a rally marking the 40th anniversary of the 1979 Islamic Revolution, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

Iranian women attend a rally marking the 40th anniversary of the 1979 Islamic Revolution, as two of them hold portraits of Iranian Supreme Leader Ayatollah Ali Khamenei, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of Iranians poured out onto the streets of Tehran and other cities and towns across the country, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Ebrahim Noroozi)

Iranians attend a ceremony celebrating the 40th anniversary of the Islamic Revolution, near the Azadi, or Freedom Tower, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of people poured out onto the streets of Tehran and other cities and towns across Iran, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Vahid Salemi)

Demonstrators chant slogan in a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, Freedom, Square in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of people poured out onto the streets of Tehran and other cities and towns across Iran, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Vahid Salemi)

Iranian President Hassan Rouhani waves to the crowd as he arrives at the podium during a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, Freedom, Square in Tehran, Iran, Monday, Feb. 11, 2019. Speaking from a podium in central Tehran, Rouhani addressed the crowds for nearly 45 minutes, lashing out at Iran's enemies - America and Israel - and claiming that their efforts to "bring down" Iranians through sanctions will not succeed. (AP Photo/Vahid Salemi)

Iranians attend a ceremony celebrating the 40th anniversary of the Islamic Revolution as one of them holds a portrait of the late revolutionary founder Ayatollah Khomeini, at the Azadi, Freedom, Square in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of people poured out onto the streets of Tehran and other cities and towns across Iran, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Vahid Salemi)

Children wave Iranian flags during a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, Freedom, Square in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of people poured out onto the streets of Tehran and other cities and towns across Iran, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Vahid Salemi)

Two women shelter from the rain during a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, Freedom, Square in Tehran, Iran, Monday, Feb. 11, 2019. In Tehran, crowds streamed in the rain from a dozen of the capital's far-flung neighborhoods to mass in central Tehran Azadi, or Freedom Square, waving Iranian flags and chanting "Death to America" — a chant that has been standard fare at anti-U.S. rallies across Iran. (AP Photo/Vahid Salemi)

A demonstrator holds an anti-U.S. placard during a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, Freedom, Square in Tehran, Iran, Monday, Feb. 11, 2019. Crowds streamed in the rain from a dozen of the capital's far-flung neighborhoods to mass in central Tehran, waving Iranian flags and chanting "Death to America" — a chant that has been standard fare at anti-U.S. rallies across Iran. (AP Photo/Vahid Salemi)

Iranian demonstrators chant slogans during a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, Freedom, Square in Tehran, Iran, Monday, Feb. 11, 2019. Crowds streamed in the rain from a dozen of the capital's far-flung neighborhoods to mass in central Tehran waving Iranian flags and chanting "Death to America" — a chant that has been standard fare at anti-U.S. rallies across Iran. Posters in Farsi read, "Death to Israel." (AP Photo/Vahid Salemi)

A group of Iranians listen to President Hassan Rouhani address the crowd during a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, or Freedom, Square, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of people poured out onto the streets of Tehran and other cities and towns across Iran on Monday, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Vahid Salemi)

Schoolgirls wave Iranian flags during a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, or Freedom, Square, in Tehran, Iran, Monday, Feb. 11, 2019. Hundreds of thousands of people poured out onto the streets of Tehran and other cities and towns across Iran on Monday, marking the date 40 years ago that is considered victory day in the country's 1979 Islamic Revolution. (AP Photo/Vahid Salemi)

Iranians wave national flags during a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, or Freedom, Square, in Tehran, Iran, Monday, Feb. 11, 2019. On Feb. 11, 1979. Iran's military stood down after days of street battles, allowing the revolutionaries to sweep across the country, and the government of Shah Mohammad Reza Pahlavi resigned. (AP Photo/Vahid Salemi)

Iranian Revolutionary Guard members arrive for a ceremony celebrating the 40th anniversary of the Islamic Revolution, at the Azadi, or Freedom, Square, in Tehran, Iran, Monday, Feb. 11, 2019. On Feb. 11, 1979. Iran's military stood down after days of street battles, allowing the revolutionaries to sweep across the country, and the government of Shah Mohammad Reza Pahlavi resigned. (AP Photo/Vahid Salemi)