NASA on Thursday announced two high-profile delays on opposite sides of the country. In Florida, takeoff for the space shuttle Discovery was pushed back nearly 24 hours so engineers could continue work on a fuel valve problem. And in Utah, thousands of onlookers were disappointed when Alliant Techsystems Inc. scrubbed the first test firing of the Ares I rocket with just 20 seconds left on the clock. A NASA manager said the delay could add several million dollars to the $75 million price tag for testing the Ares rocket.

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