11.   The wheels beat a rhythmic clap-clap-clap and dust rose up in small squalls, covering the passengers with grit.

12.   Bricks scattered, windows shattered and dust rose to the sky.

13.   Tiny particles can build up photoelectric charges with long exposure to the sun, causing dust to rise and settle.

14.   The residents said flames and billowing dust had risen up close to the border but there was no word of any casualties.