The leader of Hezbollah, which is closely aligned with Iran, said the strikes were the "first step down a long path'' that will ensure U.S. troops withdraw from the region.

Videos of the protest show what looks to be hundreds of Iranians in front of Amir Kabir University raising their fists, chanting and clapping their hands. A candlelit vigil was held earlier at the university for the victims of the shooting.

Now, as the massive demonstrations of Iran's public mourning period for Soleimani come to a close, officials believe the next steps by America' longtime foe will determine the ultimate course of the latest crisis.

On a range of national security matters, he has cast aside the same warnings that gave his predecessors in both parties pause. Former national security adviser Ben Rhodes likened Trump's foreign policy decisions to that of a "reality show."

Analysts say they don't expect an immediate jump in gasoline pump prices, but it could happen if tensions remain heightened.

If sustained, the rise in oil prices could lead to more expensive car fuel, heating and electricity bills, stifling the global economy at a time when it is already slowing.

Iran’s Supreme Leader Ayatollah Ali Khamenei warned that a “harsh retaliation is waiting” for the U.S. after the airstrike, calling Soleimani the “international face of resistance.”