'This Week': National Security Advisor Tom Donilon, Pakistani Ambassador to the U.S. Husain Haqqani, and Former Secretary of State Condoleezza Rice

WASHINGTON, May 6, 2011— -- Terrorist leader Osama bin Laden is dead, but al Qaeda vows to avenge his killing, while new threats are emerging as intelligence agencies pore over his safe-house files. The President's National Security Advisor, Tom Donilon, comes to "This Week With Christiane Amanpour" with the very latest on the mission to kill public enemy number one and what steps the Obama administration is taking to protect the United States.

The hunt for Bin Laden defined the presidency of George W. Bush. Former Secretary of State Condoleezza Rice sits down with Christiane and shares her views on the mission, the Bush administration interrogation policies that may have led to Bin Laden, and what role Pakistan's government may have played in hiding him.

Finding al Qaeda's top man hiding in plain sight in Pakistan has severely damaged America's relationship with that key ally in the war on terror. In a "This Week" exclusive, Pakistan's Ambassador to the U.S., Husain Haqqani, takes on the tough questions about whether his government knew the world's most wanted man was hiding out in his country. Is Pakistan doing enough in the fight against al Qaeda, and does it deserve billions in U.S. aid?

All week long, Christiane Amanpour and ABC News' top national security reporters have been breaking new details of this dramatic story. Senior White House Correspondent Jake Tapper, Senior Foreign Affairs Correspondent Martha Raddatz and Senior Justice Correspondent Pierre Thomas join Christiane and George Will to discuss the very latest on how the Obama administration is moving forward after taking out Bin Laden. They'll talk about the changing mission in Afghanistan, and how homeland security officials are ramping up security based on new intelligence about possible attacks.

Plus, Liz Cheney, Co-Founder of Keep America Safe, Tom Ricks of Foreign Policy Magazine and The New Yorker's Lawrence Wright discuss whether this successful mission changes the torture debate and if Pakistan is a credible partner in the fight against terrorism.

All ahead Sunday on "This Week."