The Azadi Tower is illuminated in Tehran, Iran, March 31, 2020. The Azadi Tower, a landmark monument in the Iranian capital of Tehran, was lit up here on Tuesday night as part of a ceremony showing support for people around the world in the face of the novel coronavirus outbreak. (Photo by Ahmad Halabisaz/Xinhua)

The Azadi Tower is illuminated in Tehran, Iran, March 31, 2020. The Azadi Tower, a landmark monument in the Iranian capital of Tehran, was lit up here on Tuesday night as part of a ceremony showing support for people around the world in the face of the novel coronavirus outbreak. (Photo by Ahmad Halabisaz/Xinhua)