At 32 years old, Saudi Arabia's Crown Prince Mohammed bin Salman is already the most dominant Arab leader in a generation. This week, he embarks on a cross-country American tour, where he'll pitch his kingdom to a skeptical U.S. public. He was named heir to the throne nine months ago by his 82-year-old father, King Salman, who granted his son vast new powers. 

Known by his initials -- "M-B-S" -- his reforms inside Saudi Arabia have been revolutionary. He is emancipating women, introducing music and cinema and cracking down on corruption, in a land with 15,000 princes. But selling Saudi Arabia won't be easy. In his first interview with an American television network, he was eager to discuss his country's promise and its troubled reputation head-on.

Norah O'Donnell: When many Americans think about Saudi Arabia, they think about Osama bin Laden and 9/11. They think about the terrorism that he brought to American soil.