Don't be fooled by the ads for director John Woo's new World War II movie, "Windtalkers." The star of the movie isn't Nicolas Cage or Christian Slater. Or the multi-million-dollar special effects employed for dramatic battle scenes. Or even the flag-waving, feel-good patriotism so coveted by post-9/11 American moviegoers. No, the star of "Windtalkers," which opens Friday, is an ancient language - gorgeously complex, maddeningly impenetrable to non-native speakers - without which America might not have won the war. It's Navajo. The language of the Navajo Indians was used during World War II by a select group of top-secret communications...