Tracing Xi Jinping's defining moments, how he's exercising his power and the impact on China and relations with the U.S.

As COVID-19 spread from Asia to the Middle East to Europe, why was the U.S. caught so unprepared? Despite repeated warnings of a potent contagion headed our way, America’s leaders failed to prepare and protect us. Why and who is accountable?

One year after the murder of columnist Jamal Khashoggi, a two-hour FRONTLINE documentary investigates the rise and rule of Crown Prince Mohammed bin Salman of Saudi Arabia (MBS). Correspondent Martin Smith, who has covered the Middle East for FRONTLINE for 20 years, examines the crown prince’s vision for the future, his handling of dissent, his relationship with the United States — and his ties to Khashoggi’s killing.