Iran's Influence: Far Beyond Its Borders

Whether it's the Iranian-backed Houthis now in direct conflict with a Saudi-led coalition in Yemen, or taking the lead of the Shia militias fighting the militant group ISIS in Iraq, the complexity of the relationship between the United States and Iran stretches far beyond the negotiating table in Switzerland.

As headlines continue to surface detailing Iranian intervention in conflicts throughout the Middle East, its relationship with the U.S. grows further complicated.

To learn more about Iran's heightened activity in the region, watch the ABC News Global Affairs digital original video above.