Otherplaceshavetried leaving emptypolicecruisersnearintersections, evenerecting life-size cutouts ofsmallchildrenor of a police officer aiming a radar gun.
Aegis began as a sea-based defense against hostile aircraft, but over three decades has evolved to become the most versatile missile-defense system in the world, due in no small part to the fact that destroyers and cruisers hosting the system can get wherever they need to be quickly.