CHICAGO, IL - SEPTEMBER 08: Ford Crown Victorias, being used as Chicago police cars, sit outside a police station September 8, 2011 in Chicago, Illinois. Last month Ford saw sales of the Crown Victoria climb 140 percent compared with August 2010 as police departments began to stockpile the vehicle before Ford ended production at the St. Thomas, Ontario assembly line on August 31.  (Photo by Scott Olson/Getty Images)