I´m unsure, wheather this building is under-construction. My uncle has recently been to Dubai. He told me, that he had a look on Burj Al Alam site and that there was no work going on. "There were only a few workers pumping out water", he said "there was no real construction work going on. On the sign the year of completion as been deleted. The site looks like the same on the picture from Wikipedia, which is over one year old".
