For some inventions, say the light bulb, everyone knows who invented it.
But at the U.S. Capitol on a hot July day, no one seemed to know who invented the air conditioner. Even as the statue of a man many call the air conditioner's inventor stood just down the hall.
After an hour or so of searching, Mike Veselik, from Chicago, came close to knowing.
"I know that a doctor from Florida came up with it, trying to stop people from having fevers I think it was," Veselik said.