Better lasers and more lasers are one way the Pentagon plans to get around the cost imbalance of its weapons. Missiles and precision bombs, released from sophisticated helicopters and planes, are effective, but they're not cheap, and they're single-use. The cost of a weapon may make sense against a tank, but not against a truck carrying a machine gun. Lasers are expensive to develop, but their cost of use is expected to be very low, around $1 a shot. At that price, destroying trucks and buildings with lasers suddenly makes a lot more sense than using bombs.