Air Force One http://en. wikipedia. org/wiki/Air_Force_One The grammatical errors in this passage are intentional. Air Force One is the air traffic control call sign of any U. S. Air Force aircraft 1carrying the president of the United States. Since 1990, the presidential fleet has consisted of two specifically configured, highly customized Boeing 747-200B series aircraft. While these planes are only referred to as "Air Force One" 2while the President is on board, the term is commonly used to describe either of the two aircraft normally used and maintained by the U. S. Air Force solely for the President. Air Force One is capable of flying 7,800 miles, roughly one-third the distance around the world, without refueling and 3can acommadate more than 70 passengers. Before the current two planes entered service, two Boeing 707-320B-type aircraft had operated as Air Force One starting in 1962. Since its inception, Air Force One has become a symbol of presidential power and prestige. Air Force One costs approximately 325 million dollars. Air Force one differs 4from the standard Boeing 747 in size features, and security precautions. While Air Force One has three floors, like a regular Boeing 747, 5it’s interior has been reconfigured for presidential duties. 6The planes' 4,000 square feet of interior floor space include multiple modifications. The planes' lowest levels are mostly cargo space, carrying luggage and the plane's food supply. 7The plane has storage, and freezer capacity to provide up to 2,000 meals when fully loaded. Meals are prepared in two galleys, which together are equipped to feed about 100 people at a time. The main passenger area is on the second floor, and communications equipment and the cockpit are on the third floor. There are three entrances to the airplane. One door at the front and one door at the rear open onto the lower deck. Another door at the front of the aircraft opens onto the middle deck. This is where the rolling staircase is placed for the President to enter the airplane and to emerge