Officials for the Washington Metropolitan Area Transit Authority (WMATA) are increasing security at Metrorail stations, on trains and in Metrobuses as a result of the beginning of the war in Iraq. Metro Transit Police deployed special response teams and explosive detection canine teams to conduct sweeps of Metrorail stations. "We are taking precautionary measures to assure our customers that we are doing everything that we can to make sure they can pass through our system without incident," said Metro Transit Police Chief Polly Hanson. Police officers have begun wearing bright flourescent visibility vests so that customers who notice anything unusual can quickly spot and alert a police officer. In addition, Metro staff distributed brochures to customers outlining steps to take should an emergency arise. The brochure outlines things Metrorail passengers should be aware of, such as the existence of emergency intercoms inside each rail car. Other steps include listening for operator instructions should the train stop and never block doors from closing.