Emirates announced an order in April 2000 as the first launch customer for the Airbus A3XX (later named Airbus A380), the largest civil aircraft ever built. The deal comprised five Airbus A380-800s and two Airbus A380-800F. The deal was confirmed on 4 November 2001 and Emirates announced orders for 15 more A380-800s at the same time. Two years later Emirates once again ordered 21 A380-800s. In April 2006, Emirates ordered two more A380-800s, however they cancelled their two orders for the freighter variant. In 2007, Emirates ordered 15 A380-800s, bringing their order to 58. Emirates justified its order saying that purchasing the 481- to 656-passenger super jumbo to was to maximize its use of scarce takeoff and landing slots at crowded airports like London Heathrow.