Obama Calls for Dramatic Decrease in Nuclear Weapons

Gwen Ifill will answer your questions on reddit during her first "Ask Me Anything" session beginning at 1 p.m. EDT Thursday. Is there anything you've always wanted to know about the PBS NewsHour and Washington Week journalist? Ask her anything!

The pre-trial hearing on the five suspected 9/11 plotters continued Tuesday at the U.S. base in Guantanamo Bay, Cuba -- without the accused present. The day focused on why the International Red Cross opposes requests to disclose its confidential condition reports on Guantanamo detainees.

The alleged mastermind of the Sept. 11, 2001, terror attacks on the United States and four suspected co-conspirators appear in a Guantanamo court Monday for the first time since detainees went on a hunger strike earlier this year. We'll be live-blogging events.

Edward Snowden, a 29-year-old NSA contractor, came forward as the whistleblower who revealed the existence of secret government surveillance programs that collect data on millions of phone calls and online communications. Judy Woodruff reports on Snowden's defense of his decision, as well lawmakers' response to the programs.

What are the origins of the NSA's surveillance programs, how do intelligence officials use the information and what questions may arise about the cost of privacy? Jeffrey Brown talks with two reporters who have been covering the story, The Wall Street Journal's Siobhan Gorman and Charlie Savage of The New York Times.

"They quite literally can watch your ideas form as you type." That's the memorable closing quote from an unnamed "career intelligence officer" who provided the Washington Post with details about a secret government program to collect information Americans put online.

In honor of the 69th anniversary of D-Day, Ray Suarez talks to historian Rick Atkinson about his new book, "The Guns at Last Light," which chronicles the brutal fight for victory at the end of World War II.

The National Security Agency has secretly collected data about millions of domestic and international calls by Verizon customers. Jeffrey Brown gets debate on the privacy and civil liberty concerns from Kate Martin of the Center for National Security Studies and former NSA official Col. Cedric Leighton.

Knowing what we know now, says author Rick Atkinson, it might be easy to judge the actions taken during World War II, such as the deplorable treatment of black soldiers and the firebombing of inhabited cities.

In other news Wednesday, Army Staff Sgt. Robert Bales pleaded guilty to killing 16 Afghan civilians last year. Bales recalled entering two villages at night and shooting his victims. Also, anti-government protesters in Turkey called for the ousting of police chiefs over their violent crackdown on demonstrations.