U.S. Prepares to Assign Color Codes to Air Travelers; Critics Fear System Will Be Too Intrusive. WASHINGTON Sept. 9 — The government and the airlines reportedly will phase in a computer system next year to measure the risk of every passenger who boards a flight in the United States by using color codes. According to the Washington Post, passengers will be assigned one of three codes, based in part on their travel plans, traveling companions and the date the ticket was purchased. Sources say those coded "green" will easily pass through security checkpoints. Others will be coded "yellow" and face...