Apocalyptic wall of dust barrels though Arizona desert

On Monday evening in southern Arizona, cars and trucks disappeared from the usually well-trafficked Interstate 8 highway.
A massive dust storm, known as a haboob, smothered the road and surrounding region in a thick cloud of desert dustStorm chaser Mike Olbinski had a "good inkling" thunderstorms in the area might produce such a storm, and rushed east, from California.
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But he wasn't expecting a towering, apocalyptic wall of dust.
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