Continuing this week is the factual series that examines the evolution of modern engineering. The third instalment explores the leaps in aviation technology that led to the development of the world's largest cargo plane - the Antonov An-124. Weighing in at 392 tons, the Antonov An-124 can carry tanks, trains and even other aircraft to the farthest corners of the globe. The pinnacle of modern aeronautical engineering, this gigantic cargo plane owes its existence to nearly 100 years of innovation...