That stunning takedown in the war on terror Osama bin Laden's son in law will appear in a Manhattan courtroom today. After being caught in Turkey and secretly flown to the US. ABC's chief... See More
That stunning takedown in the war on terror Osama bin Laden's son in law will appear in a Manhattan courtroom today. After being caught in Turkey and secretly flown to the US. ABC's chief investigative correspondent Brian Ross has been tracking it all and Brian this can be a real intelligence -- that's at the Saint George in this morning under heavy security the son in law will appear. Before a New York federal magistrate in a courtroom here to answer charges of conspiracy to kill US citizen. As a top member of his father in law's inner circle he once wrote we have the right to kill four million Americans one million of them children. In the world of al-Qaeda he was the guy who married the boss's daughter. Which gave him a place of prominence next to Osama bin Laden but -- -- Abu -- Never took over the family terrorist attacks. And became better known as the loud -- on the law of the al-Qaeda spokesman. Who proclaimed his delight in this didn't over the 9/11 attacks on the United States bubble but and a the CIA has been tracking Abu -- for years according to US officials. As he moved first from Afghanistan to Iran and that in January in to Turkey. Where he was arrested based on a US tip once he left -- running territory and went into Turkey. He became. An open -- the Turks ultimately agreed to send Abu -- to Jordan where before being sent on to New York officials tell ABC news the significance of capturing not killing him became apparent when he agreed to cooperate. This is a man who's in the inner circle the bin Laden's al-Qaeda operations. And now we have him alive. And he's talking. Officials tell ABC news -- son -- law has already provide important new intelligence about Al qaeda's current status personnel and finances. And details about other key al-Qaeda leaders who are still hiding in Iran enjoy this significant -- thanks very much.
This transcript has been automatically generated and may not be 100% accurate.