Newt Walks Back Bain Criticism, Van der Sloot Admits to Murder, Clinton Denies Killing Iranian Scientist: P.M. Links

• 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.