Tens of thousands of Iranians are marking the anniversary of the country’s 1979 Islamic Revolution. It's the first mass demonstration in the country since President Donald Trump returned to the White House and restarted his “maximum pressure” campaign targeting Tehran. In Tehran, people carried flags, balloons and banners as they marched toward Azadi, or Freedom, Square in the Iranian capital despite sub-zero temperatures on Monday. Alongside anti-American and anti-Israeli banners with slogans like “Death to America” and “Death to Israel,” demonstrators also carried images of Supreme Leader Ayatollah Khamenei, who has final say on all state matters.