What's at stake in US-Iran conflict

ABC News Contributor Col. Steve Ganyard analyzes the impact of Donald Trump's reported approval of an attack on Iran before the president reversed course.
2:03 | 06/21/19

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Transcript for What's at stake in US-Iran conflict
retaliate against U.S. Interests in this region, David. Our thanks to you and colonel Steve ganyard with us. How common is this? You have the president who approved attacks. The operation was under way. Planes in the air, ships in position then it suddenly called off and now the world knows about this and more importantly Iran knows. It's very rare, David. I think the Iranians were anticipating that something would happen but I think it's also indicative of the angst in the debate within the white house because they don't want to escalate the situation. We know the region is a powder keg. If they step too far things could get out of hand? Seems to be adding to the instability and, Steve, we know there's reporting the president approved attacks on Iranian targets including missile batteries and talking overnight that that was a possibly. What do you think it was that had the president stop this at the next moment and does the U.S. Stand down completely. They're probably thinking about a couple of things. What are the second and third order effects and what happens the day after? If they didn't have a clear indication of what might happen, maybe they step back for a day. This is not over. Think about this surface-to-air missile system. It moves around. So the missile that was actually shot may have driven off and if they wanted to take out that particular missile system maybe they can't find it. You know you have the world leaders who said before with the oil ships targeted we need more evidence. You have Iran putting out coordinates of that drone as Martha reported. Any chance this U.S. Navy surveillance drone was flying in Iranian airspace? There's a chance, David. Everybody -- mistakes get made in war but these type of surveillance flights have been going on for years and the U.S. Deliberately flies as James was referencing deliberately flies along commercial airline roots to stay out of sovereign territory so mistakes could have been made on the U.S. Side but think about that surface-to-air missile system, it was mobile. Maybe their system wasn't appropriately calibrated. Maybe they truly did believe that drone was inside Iranian airspace. Lots of questions that need to be answered. Colonel ganyard, thank you. It's not over yet.

This transcript has been automatically generated and may not be 100% accurate.

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