CNN CNNI Simulcast June 3, 2014 07:24:00
Matthew chance, cnn, london. time to check in with meteorologist alexandra steel. >> a dust storm blew in over tehran. how unusual is this and how did it happen? >> it is unusual in some regards although they do happen all around the world in very arid areas, from the sierra to the southwest portions of the united states. we've seen them in air zone ma many times. people weren't sure that this was coming and they certainly didn't know, although here in the u.s. the national weather service does have a sand storm advisory and a sand storm warning. here are some of the pictures though. it real...
Source: archive.org