Segregation was the cultural norm in the South during World War II, although it began to take new forms. The textile industry, which was previously the realm of only white workers, now employed African Americans at a lower wage. With increased traffic on the railroads, depots needed to be expanded for the sole purpose of maintaining a segregated station. Also, a black mathematician was not able to move with his research team from the University of Chicago to work on the Manhattan Project because the team was being transferred to "X." "X" was the Southern secret, and segregated, city of Oak Ridge, Tennessee.