Bi-State Development expanded into light rail transportation in July 1993. The original 17-mile corridor was constructed between Lambert International Airport in Missouri and Fifth and Missouri Streets in East St. Louis, Illinois. MetroLink doubled in length with the 2001 expansion to Southwestern Illinois College in Illinois and the 2003 expansion to Shiloh, Illinois, home of Scott Air Force Base. The most recent light rail expansion occurred in August 2006 when the Cross County extension was completed. This expansion added another eight miles on the Blue Line through Clayton south to Shrewsbury, Missouri.