Join Matt, a nervous flyer, and Captain Al, a seasoned Airbus A320 airline pilot as they discuss some myths and frequently asked questions about all things aviation.  This week Matt asks if airplanes have keys and if not, how do pilots start an airplane? What is the barking dog sound on the A320 and why do passengers hear it during start up? Captain Al takes us through a start up of a commercial aircraft from cold and dark all the way to taxiing to the runway.