FILE – This July 24,1997 file photo a plastic casting of the skull from the bones known as Kennewick Man, is shown in in Richland, Wash. A bill has been introduced in the U.S. Senate to require the federal government to give the bones of the Kennewick Man back to the Indian tribes from which he descended. The bipartisan bill was introduced Tuesday, April 26, 2016 by Sen. Barbara Boxer and Sen. James Inhofe. (AP Photo/Elaine Thompson,File)