In Washington, public hearings continue into the Sept. 11 attacks on the United States. At issue is whether the Bush and Clinton administrations did enough in responding to al Qaeda threats. NPR's Brian Naylor, today's guest host, catches up on what we've learned so far, and looks at what's next for the Sept. 11 investigation.
*Author of Ghost Wars: The Secret History of the CIA, Afghanistan and Bin Laden, from the Soviet Union to September 10, 2001
*Managing editor, The Washington Post
*Political editor, The Wall Street Journal