The tallest building on the planet today is the Burj Khalifa rising 2,717 feet into the desert sky over Dubai. It is a building full of hyperbole built to illustrate some of the limits of today’s construction. At 160 floors, it is higher than two Empire State Buildings and the tower that sits on its top is over 700 feet tall. The designers said that the tower was that tall so that the overall tower would not look too stubby. The designers were members of the Skidmore, Owings and Merrill (SOM) offices. The firm has had a number of tall buildings, but this is the tallest.We could ask and answer lots of esoteric questions about its cost and design, but that is not the purpose of my inquiry. You can read a great review of the building, its lighting and some of the intricacies in this latest issue of Architecture Record.My question is two-fold. First, Who is the contractor? I will leave that one to the reader to tell me.