Why does the U.S. military seem stymied in the war with Iran?

Defense analyst Stacie Pettyjohn says while the U.S. military is facing long-range missile shortages, prolonged deployments and vacated regional bases, Iran is building cheaper weapons quickly.

<p>Defense analyst Stacie Pettyjohn says while the U.S. military is facing long-range missile shortages, prolonged deployments and vacated regional bases, Iran is building cheaper weapons quickly.</p><img src='https://media.npr.org/include/images/tracking/npr-rss-pixel.png?story=nx-s1-5937516' />