The writer Graham Greene would have turned 100 years old this past weekend. Commentator Pico Iyer says Greene's stories of Haiti, Vietnam, Cuba and other countries still ring true today.
Twenty-five years ago, nearly 3,000 people were killed in the 9/11 attacks. Today, Americans are honoring the lives lost and reflecting on the aftermath of that tragic day.
NPR's Michel Martin asks John Avlon, who was chief speechwriter to New York Mayor Rudy Giuliani at the time of the 9/11 attacks, for his memories of that day.