The flag flying over the U.S. Capitol will be a little different today: It will reportedly be made of hemp!
That's a substance that's actually illegal to grow in the United States.
But lawmakers have been trying to change that law.
The Washington Post reports a Colorado advocate came up with the plan to fly a hemp flag over the capitol.
Some historians think the first American flag, sewn by Betsy Ross in 1776, was made of hemp.