 Washington Post | Necessity of medical copters questioned after crash Arizona Republic, AZ - The incident was a rarity - it marked only the second time in 23 years that two emergency medical service aircraft had collided in midair, officials said ... Investigators Search for Cause of Arizona Medical Chopper Crash NTSB Investigating Medical Helicopter Collision In Arizona NTSB Begins Investigation Of Arizona Medical Helicopter Crash |
Necessity of medical copters questioned after crash - Arizona Republic
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