The world has seen large airplanes including the Antonov, Airbus and Boeing, but the largest was rolled out last week in the United States.
Have a look at the world's largest airplane [Hi-Tech]
This airplane is called the Stratolaunch. It is a twin-fuselage aircraft which stands at 50 feet tall, has a 385-foot wingspan, 28 wheels, and six Boeing 747 engines.
Watch this edition of Hi-Tech on The Morning Call with Ismail Akwei.