PRESIDENT AHMADINEJAD - In an exclusive interview timed to his visit to the United Nations next week, the Iranian leader addresses accusations that his country has given weapons to Iraqi insurgents and is skeptical Americans would be offended by his intentions to visit Ground Zero. Scott Pelley reports. Robert Anderson and Casey Morgan are the producers.

POT SHOPS - The law some thought would put medical marijuana in pharmacies has created chaos according to critics, who say there are now "pot dealers in storefronts" who are selling to anyone with a doctor's note. Morley Safer reports. David Browning is the producer.

THE MATCH OF HIS LIFE - At the chessboard, he was a legend, becoming the world’s top-ranked player at 22 and remaining there almost continuously until his retirement. But now Garry Kasparov has his hand in Russian politics, where his opponent, Vladimir Putin, seems to have the upper hand. Steve Kroft reports. Andy Court and Keith Sharman are the producers.