Obama Addresses Drones, Gitmo in Speech on Refocusing Strategy on Terrorism

Gregory Hicks, deputy chief of mission in Tripoli, Libya, reportedly told House investigators that U.S. officials in Libya knew the assault on the Benghazi compound was a premeditated terrorist attack. He testifies at a House hearing Wednesday at 11:30 a.m. ET.

Cindy Storer and Nada Bakos were part of a majority female team of CIA intelligence analysts -- dubbed "The Sisterhood" -- who contributed to the effort to locate Osama bin Laden. Margaret Warner talks with Storer and Bakos about their intensely detailed work and frustrations with having that work sometimes ignored or belittled.

Two years after the hunt for Osama bin Laden came to an end, a new HBO documentary called "Manhunt" traces the origins of that search to far earlier than the 9/11 attacks, and profiles a group of analysts, mostly women, who helped spearhead the effort. Margaret Warner reports.

Three men who attended college with Boston Marathon bombing suspect Dzhokhar Tsarnaev were arrested and charged with disposing of evidence and lying to authorities. Gwen Ifill talks with Dina Temple-Raston, NPR's counterterrorism correspondent, about the charges and the men's friendship.

Join FRONTLINE for a live chat Wednesday at 2 p.m. ET to discuss the PBS show's recent follow-up to their documentary "Top Secret America."

Two weeks after the Boston Marathon bombings, investigators are pursuing several inquiries, both stateside and abroad, into what motivated the Tsarnaev brothers and whether they acted alone. Ray Suarez discusses the latest developments in the investigation with Evan Perez, who is covering the case for The Wall Street Journal.

In other news Friday, surviving Boston Marathon bombing suspect Dzhokhar Tsarnaev was transferred to a federal prison medical center. Tsarnaev is facing federal terror charges for the April 15 attack. Also, police in New York think they found a part of one of the airliners destroyed in the 9/11 attacks.

How should the U.S. act if it confirms that the Syrian regime has used chemical weapons? Jeffrey Brown moderates a debate on different approaches between Kori Schake, research fellow at Stanford University's Hoover Institution, and David Cortright, director of policy studies at the Kroc Institute for International Peace Studies.

Dzhokhar Tsarnaev, suspect in the Boston bombings, told the FBI that he and his brother had planned to set off additional explosives in Times Square. Judy Woodruff talks to Dina Temple-Raston, NPR's counterterrorism correspondent, about what U.S. intelligence knew about Tamerlan Tsarnaev in the years before the attack on Boston.

When bombs exploded at the Boston Marathon last week, senior correspondent Judy Woodruff was on the other side of the world in Hawaii. But even thousands of miles away, Americans mourned for the victims of Boston.