When American troops in Iraq first encountered  ambushes and roadside bombs, they realized that their unarmored trucks and hummers were particularly vulnerable. While many rushed to attach armor plates to the vehicles, some of the reserve troops who were cops back home knew of better solutions. At least two firms were selling light weight bulletproof composites that could be quickly attacked to police cars (doors, hood and so on). One type, Aztik 100, consisted of light weight, bendable panels. One side had glue on it, protected by paper that was peeled away when you wanted to attach a panel to a police car, or hummer, door or hood. Another product, RhinoPak, quickly developed a set of rigid lightweight bulletproof panels built to fit right on a hummer, including the top. Bullet proof glass is also provided for the windshield. The composite armor will stop a heavy machine-gun bullet (.50 caliber or 14.5mm. These panels would also stop most fragments from a bomb exploding nearby. As a result of recent reforms, units had money, and authority, available to get these armor kits, and many did.