ProPublica's Sebastian Rotella describes how the "restrained" testimony of confessed Mumbai terrorist David Coleman Headley differed from interrogation videos from 2009 shown in court. The videos, says Rotella, depict a "much more animated, eager, almost frantic" man trying to make a deal.

"Five days of in-depth, detailed, rare testimony from a consummate insider, is fascinating and very unusual in a U.S. courtroom," says ProPublica's Sebastian Rotella. He describes how the dramatic testimony of David Coleman Headley, a confessed terrorist of the 2008 Mumbai attacks, reveals a striking portrait of "a man taking stock of the wreckage of his life."

In this excerpt from "WikiSecrets," coming May 24, FRONTLINE correspondent Martin Smith tells the story of Pfc. Bradley Manning and his struggle with the Army's Don't Ask, Don't Tell policy. Manning is currently charged with handing over half-a-million classified documents to the WikiLeaks website.

In this excerpt from "WikiSecrets," coming May 24, FRONTLINE uncovers video of Pfc. Bradley Manning around the time he allegedly handed over half-a-million classified documents to the WikiLeaks website. With exclusive access to those closest to Manning--including his father, close friends and his Army bunkmate--FRONTLINE explores how and why the secret cache of documents may have been leaked.

FRONTLINE examines the biggest intelligence breach in U.S. history and the two men behind the leaks: WikiLeaks founder and Internet activist Julian Assange and the Army intelligence analyst Bradley E. Manning. Through in-depth interviews with Manning's father, Assange and others close to the case, veteran FRONTLINE correspondent Martin Smith tells the full story behind the leaks.

American David Headley has admitted to doing reconnaissance for a terrifying plot to attack the Danish newspaper that published the cartoons of the Prophet Muhammed. The plan was to take employees hostage and decapitate them and throw their heads out the window. ProPublica reporter Sebastian Rotella explains how Headley cased the city.

Samraz Rana insists her husband Tahawwur was not involved in the Mumbai attacks, despite the claims of David Headley, the government's star witness -- and Tahawwur's childhood friend and business partner.

His U.S. passport made him "a dream come true" for Lashkar-i-Taiba, the Pakistani group behind the 2008 attacks in Mumbai. But having been caught smuggling drugs, Headley also worked as an informant for the U.S. Drug Enforcement Agency. "He just turns around immediately and betrays everybody when it's convenient for him," says one terrorism analyst.

After almost ten years of war, can the United States get out of Afghanistan? In "Kill/Capture," coming May 17, FRONTLINE producers Dan Edge and Stephen Grey carry out an in-depth investigation into the United States' unprecedented campaign of targeted killing of militants in Afghanistan.

The U.S. maintains a September 2010 airstrike in Takhar province targeted and killed a "significant" Taliban leader. But independent investigators have concluded that the eight people who died were all civilians, and that they died because of "grave" intelligence flaws.

Inside the campaign vs. Al Qaeda and Taliban militants in Afghanistan and Pakistan

Reporter Najibullah Quraishi gains rare access to fighters loyal to

Author Steve Coll on Ayman al-Zawahiri taking control of Al Qaeda, and the likelihood of a power struggle.

"There'd been a long time for the United States government to consider the various dilemmas of Osama bin Laden's prospective martyrdom," says author Steve Coll on bin Laden's final resting place. "If you capture him but don't kill him, what do you do? If you do kill him because he resists, ... then how do you avoid a physical shrine and some way for followers or successors to honor his memory?"

Author Steve Coll on the Al Qaeda leader's final years, from his access to media to his decision to surround himself with family. "He clearly was reading books. He had access to English-language media," says Coll. "It seemed reasonable to guess that one way or another he would have found a way to preserve a marriage or a married life, a family life."

Author Steve Coll on Pakistan and the suspicious location of bin Laden's compound.

Is Al Qaeda once again becoming a significant presence in Afghanistan? In "Fighting for bin Laden," coming May 3, Afghan journalist Najibullah Quraishi ("Behind Taliban Lines") journeys deep into enemy territory to meet a band of insurgents who say they are loyal to Osama Bin Laden and are readying a new offensive against coalition forces.

FRONTLINE investigates the the declining rate of autopsies. As a result, not only do murderers go free and innocent people go to jail, but the crisis in death investigation in America is also a threat to public health. 1/31/2012

The case of Raymond Robair, and his family's six-year search for justice.

Tom Curran and reporter Mark Trahant examine a little-known chapter of the Catholic Church sex abuse story: decades of abuse of Native Americans by priests and church workers in Alaska. The Silence shows how the isolation of the villages and the absolute authority of the church over the Native population created an atmosphere where molestation could go unchecked and unreported.