Dan Sullivan, an air opperations manager with the interagency team managing the Terwilliger Fire, explains why an unauthorized drone flying close to the Terwilliger Fire on Aug. 26, 2018, caused the grounding of helicopters. The fire is burning east of Springfield, Oregon. [Dylan Darling/The Register-Guard]

<p>Dan Sullivan, an air opperations manager with the interagency team managing the Terwilliger Fire, explains why an unauthorized drone flying close to the Terwilliger Fire on Aug. 26, 2018, caused the grounding of helicopters. The fire is burning east of Springfield, Oregon. [Dylan Darling/The Register-Guard]</p>

News and interviews from The Register-Guard, Eugene Oregon

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