Some defense thinkers believe directed energy weapons, lasers, hold out real battlefield promise, particularly against future enemies armed with large numbers of relatively cheap precision guided weapons. For example, the folks at the Center for Strategic and Budgetary Assessments in Washington say lasers provide a potential solution to the so called G-RAMM (guided rockets, artillery, mortars and missiles) problem. Using missiles to shoot down incoming rounds can get very costly and a counter G-RAMM arsenal can be rapidly depleted; lasers solve the finite counter-munition arsenal problem. Granted, directed energy weapons are not ready for prime time, although they are getting...