Great Do-Overs in History

From the Harriet Miers's Blog:

Well by now you probably know that I have to "take a mulligan" on my questionnaire. Well my answer is bring it on!! Its like I've always said. There's no shame in getting something wrong the first time, the only shame is giving up!!! . . .

With that in mind, I made this list of great do-overs from history to cheer me up. Maybe it will cheer you up too!! . . .

* Here's one thats particularly relevant to me: Dred Scott Decision. Alot of people dont realize but sometimes the Supreme Court makes a mistake, I've been reading about it, and then they can go back and overturn it. Just like my questionnaire!!