Newt says he shouldn't have attacked Romney's Bain record, because Obama is a class warrior.
- Joran van der Sloot admits to killing Peruvian woman; Natalee Holloway still a mystery.
- U.S. denies killing Iranian scientist.
- Rick Santorum makes big promises in South Carolina.
- Protestors celebrate Gitmo's 10th birthday.
- Evangelicals fret over Romney.