A massive dust storm buried parts of New Mexico and Texas in airborne smut Monday morning, shutting down highways and leaving nearly 900,000 residents trapped in a potentially deadly cloud.The dust storm — a particularly fierce variety known as a “haboob” — was miles wide and thousands of feet tall,

A haboob (pronounced “huh-boob”) is a dust storm that appears like an advancing wall of dust and debris thousands of feet high and miles long.