PHOTOS: Chicago public school teachers on strike

73 of 73: Chicago teachers Michael Williams and Alma Hill walk a picket line outside Benjamin Banneker Elementary School in Chicago, early Monday, Sept. 10, 2012, after the teachers went on strike for the first time in 25 years. Union and district officials failed to reach a contract agreement despite intense weekend negotiations. (AP Photo/M. Spencer Green) (AP Photo/ M. Spencer Green)

REPLAY SLIDESHOW