David Ray Thornburg couldn't understand why the Travel Centers of America truck stop off Interstate 35 in Denton wasn't displaying Old Glory — especially on Memorial Day. So he grabbed his video camera and went to Walmart. The store donated a flag. Thornburg went back to the truck stop, climbed up the pole and put up the flag. His YouTube video tells the rest of the story. He explains that just after he put the flag up, truck stop employees took it down.