Archaeologists believe they have found the key to unlocking a mystery almost as old as the Great Pyramid itself: Who built the structure and how were they able to transport two-ton blocks of stone to the ancient wonder more than 4,500 years ago?
Writer Carl Hoffman traveled to Egypt in February 2011, a week after popular demonstrations led to the president's resignation. These are his observations. Tourism is Egypt's second largest source of revenue, bringing in $13 billion in 2010. The Great Pyramid at Giza, after all, is one of the seven ancient wonders of the world.