With a little help from its friends at Northrop Grumman (NYSE:NOC) and Raytheon (NYSE:RTN), the U.S. Navy has just developed a workable laser cannon that costs less than $1 to shoot. Is this the weapon that helps turn the tide on rising U.S. defense spending? Is it the weapon that helps turn the table on bad guys using their "asymmetric warfare" tactics of IEDs and carrier-killing missiles?

Perhaps. Motley Fool contributor Rich Smith explains...

Motley Fool contributor Rich Smith has no position in any stocks mentioned. The Motley Fool owns shares of Lockheed Martin, Northrop Grumman, and Raytheon Company. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.