Arizona Department of Public Safety helicopter crash kills 2
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A police helicopter crashed Wednesday night, killing two people aboard, as authorities responded to an "active shooter," incident, authorities said.
UPDATE: 2nd pilot dies after helicopters collide over N.J. One person died and another person was critically injured after two helicopters collided and crashed in New Jersey on Sunday afternoon.
The National Transportation Safety Board is holding a hearing and plans to propose dozens of safety recommendations to address failures before the crash.
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