Also during World War II, the Quartermaster Depot, in conjunction with Fort Knox, Kentucky, housed German prisoners of war until 1945. End of segregation Jeffersonville ended segregation in its public schools in 1952, two years before the Supreme Court case Brown v. Board of Education ruled that segregation was unconstitutional. Prior to this, Jeffersonville High School was reserved for white high school students. Meanwhile, black students in grades one through twelve were sent to Taylor High School. While the New York Times held up Jeffersonville as a model for all "southern-minded" cities, integration came at a cost. Though black students were allowed to attend the newly integrated Jeffersonville High School, black instructors previously employed at Taylor High School were terminated. Annexation On February 5, 2008 the city of Jeffersonville officially annexed four out of six planned annex zones. The proposed annexation of the other two zones was postponed due to lawsuits. One of the two areas remaining to be annexed was Oak Park, Indiana an area of about 5,000 more citizens. The areas annexed added about to the city and about 4,500 citizens, raising the population to an estimated 33,100. The total area planned to be annexed was . The areas received planning and zoning, building permits and drainage issues services immediately, with new in-city sewer rates. Other services were phased in, such as police and fire, and worked jointly with the pre-existing non-city services until they were available. The Clark County Courts dismissed the lawsuits against the city on February 25, 2008. This dismissal brought the remaining Oak Park area into the city. The population of the city grew to nearly 50,000 citizens, making it the largest annexation in Jeffersonville's history. Big Four Pedestrian Bridge and Big Four Station Conceived in the 1990s and completed in 2014, the Big Four Bridge was converted to a pedestrian bridge in a joint effort between Kentucky and Indiana governments. An average of 1.5 million pedestrians and bicycles cross the roughly-1/2 mile bridge each year. 1/4 mile ramps complete the bridge on each end. The bridge is also decorated with a colorful LED lighting system that operates from twilight to 1 am. The lights can be customized by request. On the Jeffersonville side of the bridge the city constructed Big Four Station, a plaza and park. The park features green space, fountains, a farmers market on Saturdays, a restroom, a bike-sharing station, a