[Baron Munchausen]

They used to make them in the 19th century and into the early in the 20th century. I have heard that they stopped during World War II because the Nazis planned to sabotage the US economy by flooding it with $2 bills. Why did they choose the $2? Because you only had to make half as many! (Large denominations like $5 and $10 were actually much less commonly used in those days because of the difference in the value of money).

In 1976 they started printing them again to 'save money' (by printing fewer ones) but most people don't see them very often. You usually have to go to a bank and ask for one.