While domestic attention this week is focused on the Ukraine impeachment saga, our foreign policy attention is on China and North Korea. But we would do well to keep a close eye on Iran as well.

As U.S.-Iran tensions escalate and Iranian attacks, such as the recent strikes against Saudi oil facilities, go largely unpunished, there is a growing risk that Iranian hardliners will attack U.S. interests. My specific concern is that Iran will go beyond shooting down American drones, and instead endanger American lives. There are two issues here.