This is a picture looking towards kite beach and the Burg al Arab - in fact these are trainee kite surfers who were being put through their paces by no less than 5 kite surfing schools who had set up next to the running track (and what looks like a new cycle track albeit it seems to be mostly sand) yesterday afternoon.
If you have ever seen a kite surfer in action it is a truly an art worth mastering as it looks great fun and also extremely difficult - almost all of these kites were being operated from land - presumably to practice control although there were a couple of adherents in the water.