In the first extensive briefing on the April first collision between a U.S. surveillance plane and a Chinese jet fighter, Defense Secretary Donald Rumsfeld said the US plane did not change course until after the collision. And the crew did, Rumsfeld said, frequently issue maydays, alerting China that it was about to make an emergency landing. The Pentagon released video of earlier encounters with Chinese jets in the region, showing how close they flew to the American surveillance craft. NPR's Tom Gjelten reports.

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