in 1998, he wrote the screenplay for "the siege," a film starring denzel washington about a terrorist attack on new york. three years later, it became a top-rented movie, after september 11th. but wright is best known for his non-fiction. he's a staff writer for the "new yorker" and in 2007 was awarded the pulitzer prize for "the looming tower," a book, later turned hulu series, about events leading up to the 9/11 attacks. i asked why he'd returned to fiction now. >> as a journalist, you're always asking what happened. and in fiction, you're allowed to ask what could happen. so it is similar. but it gives you the opportunity to create a new canvas, and also to get inside the minds of your main characters. >> brown: his main character is a scientist with the world health organization, named henry parsons, who has experience with ebola and other viruses, and is now trying to stop what's called "kongoli flu," first seen in indonesia. it's fiction, but filled with scientific fact. >> i interviewed a lot of experts-- but i also got them to read it, to make sure that i hadn't made some colo