What does U in RDU Stand for?

What provision was made to the Dawes Act of 1887 to prevent Indians from being taken advantage of? When were the first ceremonial mounds built? What were slave houses like? What is the value of a 1853 half dime in good condition? There was a song I think by the Staple Singers about a man John Brown I believe who went to war was injured and when he came home his mother could hardly recognize him. Has anyone heard of it? In contrast to the Chesapeake New England s settlers were? What was the first year the 3 legged buffalo nickel was made? What is the most commonly hipanic last name used in america? How much would a late 1800 silver dollar coin value? When were the US 500 dollar bill and 1000 dollar bill discontinued? How many troy ounces in a 1881 10.00 liberty gold coin? What were the terms of the treaty of Massasoit? When was Emma Holmes born a native American? What was the cost of postage stamps in 1950? What is the value of 1916 coin? What is the chumash habitat? Why did the US not allow more refugees in before World War 2? Did tad Lincoln die when his dad was still in Office? A roll of pennies is worth? What did kids wear in 1871?