Pundits have been noting what they see as some long-shot candidates in the running for president in 2012. Most agree that Michele Bachmann is probably a long- shot. But at one time a fresh-faced senator from Illinois was considered a long shot for the presidency, and yet here we are. This is America, where anything can happen with a lot of hard work and keeping your "eyes on the prize," right? Celeste Headlee takes us through an exploration of long shots in U.S. history.