U.S. Troops Told to Use Tougher Tactics (washingtonpost.com)
Drivers and passengers at checkpoints will be ordered out of vehicles with their hands raised and will be searched. Cars and trucks will no longer be permitted to cross through U.S. and British convoys. Any vehicle blocking traffic will be rolled over. And if civilians with hands in their pockets approach troops and fail to respond, first to a shouted command and then to a warning shot, they will be killed, the officials said.

Drawing on lessons from the British experience in Northern Ireland and the American experience in Vietnam, U.S. forces also have begun house-to-house searches for paramilitary hideouts and are conducting commando raids and airstrikes to pick off senior military and political leaders. Drone reconnaissance aircraft have been pressed into service to spot convoys of civilian vehicles in which paramilitary members may be traveling, as strike aircraft maneuver above, ready to attack in response to any sightings.

"Everyone is now seen as a combatant until proven otherwise," a Pentagon official said, detailing some of the new measures.
http://www.washingtonpost.com/wp-dyn/articles/A63045-2003Mar31.html