In this frame grab made from WGN-TV, Chicago firefighters work to save firefighters that were trapped when a wall collapsed Wednesday Dec. 22, 2010 in Chicago's South Side while they were fighting a blaze at an abandoned commercial building. Fire Media Affairs Director Larry Langford confirmed that firefighters were unaccounted for at the scene on Chicago's South Side and that rescue crews were working to save them. (AP Photo/Courtesy WGN-TV)