A driver is stuck in a traffic jam on the highway outside of Washington, D.C. Nothing is moving. Unexpectedly, a man on foot knocks on the driver's window. The driver rolls down the window and asks, "What's going on?" The man on foot replies, "Terrorists have locked all of Congress inside the Capital Building and they're demanding a 100 million dollar ransom. If the government fails to pay, the terrorists claim they will douse their hostages in gasoline and set them all on fire. Some of us are going from car-to-car collecting donations." "How much is everyone giving, on average?" the driver asks. The man on foot replies, "Roughly a gallon."