Cenk digs into new clues that hint at what Mitt Romney may be hiding in his tax returns, then revisits why the U.S. needs more gun control in the wake of another mass shooting, this time in New York City. Dorothy Lucey weighs in on the new book “No Easy Day,” which claims to reveal details about the military operation that killed Osama bin Laden. David Borden, founder of StopTheDrugWar.org, talks about medical marijuana dispensaries being shut down in Los Angeles and the Obama administration’s tough drug policy. Plus, the TYT Supreme Court rules on whether cycling champion Lance Armstrong should be stripped of his titles.