MICHEL MARTIN, HOST: Filmmaker Ken Burns has chronicled so many of America's important events and personalities, from the Civil War to Prohibition to baseball to jazz, with a signature blend of poignant images and accessible scholarship. So it isn't surprising that he opens his latest documentary with a familiar face - Anne Frank's. But he highlights a lesser-known fact about the Frank family, that they tried to escape to the U.S. but were unable to get past the red tape and active hostility of the U.S. immigration system. And they weren't alone. Thousands of Jews tried and failed to enter...