How much are we paying for this war?

Ian Dennis Longstaff writes: Re. "Critical thinking the first casualty of war" (Tuesday). The last armed mission over Iraq presumably carried guided bombs. Were these jettisoned over the sea prior to landing for safety reasons? This would be the norm. How much do these guided bombs cost? What were the other costs of the mission with long-range flight refueling, etc? We have recently seen on TV one used to destroy a truck -- perhaps worth $5000! The "war"cannot be won from the air. Air just provides cover for ground troops, and there are none.