Crown Prince Nayef Abdul-Aziz is seen on a screen in Riyadh, Saudi Arabia, on Sunday. He was the second heir to the throne to die outside the country in less than a year. (Associated Press)

Crown Prince Nayef Abdul-Aziz is seen on a screen in Riyadh, Saudi Arabia, on Sunday. He was the second heir to the throne to die outside the country in less than a year. (Associated Press)