To put it mildly, the US screwed up when it decided to carry on with its Zumwalt-class stealth destroyers when they depended on smart ammo the Navy couldn't afford. However, it might have a clever workaround. Officials speaking to USNI News say the Navy is looking at Raytheon's Excalibur, a GPS-guided artillery round, as a substitute for the custom LRLAP (Long Range Land Attack Projectile) shells the Zumwalt's main guns were designed to use. Excalibur has roughly half the range at about 30 miles, but it costs much less -- about a quarter of the $800,000-plus cost per round of LRLAP. It can also hit moving targets where LRLAP couldn't.