A protester rubs her eye before being arrested during a Chicago Teachers Union protest, in front of city hall in Chicago March 27, 2013. Chicago plans to close 54 schools and 61 school buildings by the beginning of the next academic year in the country's third-largest public school district. If the plan, which requires approval by the school board in May, is carried out, it will be the biggest mass closing by a school district in U.S. history. REUTERS/John Gress (UNITED STATES - Tags: EDUCATION POLITICS SOCIETY CIVIL UNREST)