Trump's ultimatum sparks chaos: Iranians form a "human shield" on bridges VIDEO

The video shows a crowd of people unfurling a massive Iranian flag across the bridge, while participants in the march wave smaller flags.

It is a symbolic, but also desperate action by citizens following a public call by Alireza Rahimi, Secretary of the National Youth Council, urging young people, students, athletes, and artists to form human shields around power plants and bridges across the country.

U.S. President Donald Trump warned that "an entire civilization will die tonight" unless Tehran accepts an agreement that includes reopening the Strait of Hormuz.

Trump threatened the complete destruction of Iranian power plants and bridges if traffic in the strait is not normalized.

Although Trump left minimal room for a diplomatic solution in his statements, saying that "something incredibly beautiful and revolutionary might happen," the rhetoric has reached a boiling point.