The Big Muddy

You see this from time to time:

(CBS) They're praying for rain in the Midwest, which is suffering through its worst drought in 17 years. ... The lack of water is hitting the Midwest corn crop especially hard and, as Cynthia Bowers reports, rivers are running low, even the mighty Mississippi, where there's a whole lot less Big, and a whole lot more Muddy this summer. The drought has left the river within two feet of its all-time low.

Uh, Cynthia, the Big Muddy is the Missouri River.