How many workers is did it take to build Burj Khalifa?

Why is the Spanish treatment of the native Americans wrong according to DE Las cases? What is the disadvantage of tourism? Is the Cape Lookout Lighthouse haunted? How many countries does Missouri have? What is the climate of the tropical forest? Why is the grand canyon national park a source of national pride for the people US? What is a system of streams that connect to one primary river called? How many rock climbers are in the world? What does ''sea to shining sea'' mean? Who has control of the Suez canal? How many of the golden girl are dead? Can you bring a Swiss Army Knife to Yellowstone National Park? What is the largest river in South Carolina? Which of The Great Lakes borders Rochester NY? What did the mini albert einsteins sing on night at the musuem battle of the smithsonian? What can happen when a wetland is replaced by a development in an area? Where is the Henry Thomas Museum in Wyanet Illinois located? What is the inspiration for the saying on the Washington Monument? What is the population for great barrier island? Where did Columbus believe he had landed after his voyage across the Atlantic Ocean?