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The National Transportation Safety Board and other agencies are still investigating what caused a deadly mid-air collision between two Cal Fire helicopters on Sunday.
CABAZON, Calif. — A spray of pink retardant marked a rocky hillside in Riverside County on Monday, where only hours earlier, two firefighting helicopters suffered a rare and fatal collision
CABAZON, Calif. — A spray of pink retardant marked a rocky hillside in Riverside County on Monday, where only hours earlier, two firefighting helicopters suffered a rare and fatal collision