Kansas, the Sunflower State, is synonymous with the Great Plains and wheat fields. Coronado encountered the native Kansa, Wichita, and Pawnee people when he claimed the land for Spain in 1541. Part of the Louisiana Purchase, "Bleeding Kansas" became the center of the slavery controversy in the years leading up to the U.S. Civil War. Despite the Dust Bowl of the 1930s and a reputation for tornadoes fostered by The Wizard of Oz, Kansas has grown with industry. The largest city of Wichita is among the nation's largest aircraft and aerospace centers and financial services dominate in its northeastern corner, which lies within the major metropolitan area of Kansas City, Missouri.