DETROIT- A new documentary about Detroit will premiere tomorrow at the University of Michigan. The film traces the rise and ruin of the Motor City. Detroit Public Radio's Celeste Headlee reports: Detroit: Ruin of a City is not a slick, expensively produced documentary like Fahrenheit 9/11 or Super Size Me. The film was made by two academics Michael Chanan from the University of the West of England in Bristol and George Steinmetz of the University of Michigan. They used a handheld digital camera and lots of archival tape. It cost about 20 thousand dollars to produce. Steinmetz says Detroit is...