The Worst Sandstorm in Saudi Arabia

I post this video link, because i remembered it, I think this was the worst sandstorm of saudi arabia...
I remember i was at our project site at sulimaniyah, riyadh, saudi arabia at that time..it was at early 9am..i heard voices from everywhere...shouting... and when i looked upon the sky, i saw a reddish brown cloud like moving faster going thru our area... immediately i shouted at my workers to go inside the room. After that, all the area of riyadh was in all dark. We could not see anymore the kingdom tower which is the tallest building in the kingdom of saudi arabia. We could only have vision of 300 meter visibility. It was very hard to drive going back to our apartment. So we just drive slowly coz' of very limited visibilty of the road. We almost have an accident at that time. And i heard that more are sick of asthma, nasal congestion ,hard to breath because of the situation at that time. And i am glad and thankful that me and my workers were not harmed at that time.It was my unforgettable experience of the worst sandstorm in saudi arabia...