Officer John Ritter of the Greece, New York, Police Department, suffered minor shrapnel wounds but was released after treatment at a hospital.

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Although aneurysms can occur in the chest (the thoracic variety killed actor John Ritter last year), 90% of the time they occur in the abdominal aorta.

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Associated Press writers contributing to this report include Jeff Wilson, Bob Jablon, Greg Risling, Shaya Tayefe Mohajer, Linda Deutsch and John Antczak in Los Angeles and Ken Ritter in Las Vegas.

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