One of the recent troubles in the muni market is the example of Harrisburg, PA, which tried to file Chapter of the bankruptcy code in 2011 . The focal point of its problems was the city's which was slated for a renovation that cost several hundred million dollars. Most bonds are bankruptcy remote, so that if a project like this fails the city is not obligated to help out financially. Harrisburg decided, however, to issue bonds to help pay for the renovation when it was clear the project was not progressing as expected. Because the city is the state's capital, politicians at two levels got involved, which led to the bankruptcy filing being contested. In contrast, AL, was able to file that year, making it one of the largest muni bond defaults in U.S. history