The rise and fall of the Boeing 747

Boeing's 747 is one the most recognizable planes to take to the skies. It has flown more than 3.5 billion passengers since 1970. But over the last few decades, airlines have looked for more ways to cut costs and to make airplanes more efficient. CNBC visited Boeing's Everett, Washington factory to see the last 747 roll off the production line. It will go to Atlas Air for cargo deliveries. CNBC takes a look at how the 747 changed aviation and what's next for Boeing.