Nebraska is a state that lies in both the Great Plains and the Midwestern United States. Its state capital is Lincoln. Its largest city is Omaha, which is on the Missouri River. Wikipedia

Oklahoma City is the capital and largest city of the U.S. state of Oklahoma. The county seat of Oklahoma County, the city ranks 27th among United States cities in population. The population grew following the 2010 Census, with the population estimated to have increased to 610,613 as of July 2013. Wikipedia