Despite claims of depleted missile arsenals, Iran's advanced munitions continue to evade air defense systems, raising concerns about their effectiveness.

The U.S. and Israel say they've depleted most of Iran's missile arsenal, but its weapons — including controversial cluster munitions — are challenging even the most advanced air-defense systems. <p>The U.S. and Israel say they've depleted most of Iran's missile arsenal, but its weapons — including controversial cluster munitions — are challenging even the most advanced air-defense systems.</p><img src="https://media.npr.org/include/images/tracking/npr-rss-pixel.png?story=nx-s1-5760839" />