Rick calls in a museum expert to examine a one-of-a-kind Leonardo Da Vinci Flying Machine. | Pawn Stars on History

#OnThisDay (1906): The Wright Brothers, Wilbur and Orville, are issued patent No. 821,393 for their 'flying machine.' David McCullough tells you five things you should know about the Wrights, but you can get the full story in his excellent book "The Wright Brothers," http://amzn.to/2lM5bHN (Turn sound on, not because we don't have a caption file but because who wouldn't want to hear that voice?) | History in Five