the railroad losing its potato business forever was the Penn Central Transportation Company (PC), whose interchange service became so bad during the winter of 1969–70 that a large portion of the 1969 potato crop was spoiled by freezing when car heaters ran out of fuel. The claims process against PC was not resolved prior to PC's bankruptcy declaration the following June. As a result, several potato farms went out of business; those that survived distrusted rail service and never returned to using the railroad. Inbound chemicals and outbound paper from mills on the Penobscot River at Millinocket and East Millinocket were major revenue sources for the BAR from 1900. Another paper mill was built in Madawaska in 1925. Pulpwood and wood chip shipment to the paper mills became increasingly important as potato loadings declined. The remote port facilities at Searsport were a preferred loading point for ammunition during World War II, and BAR transported heating coal and aircraft fuel to Loring AFB for Strategic Air Command bombers through the Cold War. BAR painted 2,500 boxcars in the red, white and blue colors of the US flag during the 1950s. A less-expensive oxide red paint scheme with large white reporting marks was adopted during the Vietnam War. The line from Brownville Junction to Katahdin Iron Works was abandoned in 1922, but the rails remained in place until 1933. Passenger operations Into the 1950s, the Bangor and Aroostook operated an afternoon train, the Aroostook Flyer, on the company's mainline from Bangor (where a connection could be made from the Boston & Maine's Penobscot from Boston), to Brownville, Sherman, Oakfield, Presque Isle, Caribou and concluding in Van Buren (opposite St. Leonard in New Brunswick). A morning train making local stops, the Potatoland, ran from Bangor, using the same route, but after Van Buren continued west to St. Francis. Service (#9 north/#12 south, and also scheduled to meet the Penobscot) operated from Bangor to Derby, leaving the main route heading west to Greenville, whereupon it joined Canadian Pacific trackage to Megantic, Quebec on Lac Mégantic. Greenville served as a transfer point for connecting with east-west Atlantic Limited and other Canadian Pacific Railway service from Montreal to Saint John, New Brunswick, via Sherbrooke, Quebec. The company also offered service on an interior branch from Oakfield directly north to Fort Kent, a stop on the route to St. Francis. Postwar BAR passenger train service ended in