What if Historians

Discussion with architects, historians, engineers, and builders to find out if we could use modern day innovations to recreate these iconic masterpieces, or if fundamental techniques have been lost to time. The Colosseum, the Great Wall of China, the Notre Dame Cathedral. What would it take to build these remarkable super structures today? How long would it take? How much would it cost? How many workers would we need? In our modern era of glass and steel, could we even pull it off? In Part 1, Egypt's Great Pyramid is one of the world's greatest and most mysterious marvels, and using cutting-edge tech and the latest engineering innovations, experts reveal what it would take to build the ancient wonder today.

Motown's 1986 double-LP, What's Going On/Let's Get It On combined Marvin Gaye's two best-known albums in one set. Although the moods of the two albums aren't necessarily compatible the first is a reflective social protest piece, the second, well, the title is self-explanatory it was an excellent bargain to have the two classic albums together.

In war, victory can be held hostage to seemingly insignificant incidents - chance events, opportunities seized or cast aside - that can derail the most brilliant military strategies and change the course of history. What if the Japanese had conquered India and driven out the British? What if the strategic link between the United States and Australia had been severed? What if Vice Admiral Nagumo had launched a third attack on Pearl Harbor? What if the US Navy's gamble at Midway had backfired?