‘There was a big dust storm, called a haboob,’ he said.
This limitation caused them to run into a haboob, or dust storm, that they could not fly over without breaking the 200 foot limit.
Flying at 500 feet, the helicopters got caught in what is known in the Dasht-e-Kavir, Iran's Great Salt Desert, as a ‘ haboob ’ - a blinding dust storm.
On the other hand, human beings exposed to the summer desert, winter in Kashmir, or the spring haboobs over Iran quickly reach their limits.