From the Wall Street Journal:
The U.S. Navy has developed a working prototype of a rail gun that uses electricity to fire projectiles at high speeds with great precision at incoming enemy missiles and aircraft. Already, the Navy can accurately launch projectiles at distances over 100 miles at speeds over 3,000 miles an hour.
Last year the Navy launched a trial deployment of a solid-state Laser Weapon System on board the USS Ponce in the Persian Gulf—the first effective deployment of a laser weapons system by any of the services. High-power microwave weapons that disrupt or destroy internal electronic components of enemy weapon systems are also a near-term possibility.