(Adds comments from White House, background)
By Jonathan Allen
NEW YORK, March 8 (Reuters) - A son-in-law of Osama bin Laden pleaded not guilty in a New York court on Friday to conspiring to kill Americans, becoming one of the highest-ranking al Qaeda figures to face trial in the United States for crimes connected to the Sept. 11, 2001 attacks.
Suleiman Abu Ghaith, a militant who has acted in videos as an al Qaeda spokesman, made his initial appearance in U.S. District Court in Manhattan, only blocks from the site of the hijacked plane strikes on the World Trade Center.
The son-in-law of bin Laden, mastermind of the Sept. 11 attacks who was killed by U.S. forces in Pakistan in 2011, was captured on Feb. 28 and brought secretly to the United States on March 1, prosecutors said in court.
Law enforcement sources said he was detained in Jordan and was believed to have been expelled from Turkey.
The balding, bearded Abu Ghaith, 47, was led handcuffed into the crowded courtroom, the largest in the courthouse. Dressed in dark blue prison garb, he appeared to be cooperative and to follow the proceedings closely through an interpreter, frequently nodding.
Evidence against Abu Ghaith includes videos, audio recordings of him and others and a 22-page report with transcripts of remarks he has made to law enforcement since his arrest, prosecutors said.
Abu Ghaith spoke twice in court, answering "Yes" when Judge Lewis Kaplan asked him if he understood the accusations and "Yes" when asked if he wanted court-appointed lawyers Martin Cohen and Philip Weinstein to represent him.
Weinstein, who previously represented Faisal Shazad, a Pakistan-born U.S. citizen who admitted trying to set off a car bomb in Times Square in 2010 and is serving life in prison without parole, entered a not guilty plea on Abu Ghaith's behalf.
Prosecutors said they expect the Abu Ghaith trial could last three weeks. A trial date will be set at a hearing on April 8.
Security was especially tight at the courthouse, where entrances were barricaded, although Paul Browne, the New York Police Department's chief spokesman, said there was "no known specific threat against the city as a result of Abu Ghaith's presence here."
Earlier efforts by the Obama administration to hold civilian trials in New York City for suspected Sept. 11 plotters met with resistance over the needs for extreme and costly safety measures.
Mayor Michael Bloomberg said in 2010 the cost of hosting a trial for another leading suspect, Khalid Sheikh Mohammed, and four accomplices would top $200 million annually. With public opposition so strong, the case was moved to the U.S. military base in Guantanamo Bay, Cuba.
U.S. officials said the decision to bring Abu Ghaith to New York for trial in federal court was made at the highest levels of the administration of President Barack Obama.
White House spokesman Josh Earnest said on Friday that the Defense, Justice and Homeland Security departments, as well as intelligence agencies, were "unanimous" in backing the decision to handle Abu Ghaith's case in the civilian court system.
The Obama administration's decision to charge Abu Ghaith in a civilian court was criticized by several prominent Republican senators, including Minority Leader Mitch McConnell and John McCain, Lindsey Graham and Kelly Ayotte, who suggested the move would make it harder for the United States to collect intelligence on future plots.
McConnell said in a statement that bringing Abu Ghaith to the United States "solely for civilian prosecution makes little sense, and reveals, yet again, a stubborn refusal to avoid holding additional terrorists" at Guantanamo.
In court on Friday, the judge read aloud from the indictment, which accuses Abu Ghaith of urging allegiance to bin Laden and threatening attacks similar to Sept. 11 against the United States.
The indictment said Abu Ghaith delivered a speech that included the phrase "the storms shall not stop, especially the airplanes storm" and advised Muslims "not to board aircraft and not to live in high rises."
Abu Ghaith stood while the judge was speaking, but partway through reading the details of the charge, the judge broke off and told him he could sit.
The indictment accuses Abu Ghaith of acting in a conspiracy that "would and did murder United States nationals anywhere in the world," listing actions before and after Sept. 11, 2001. (Additional reporting by Chris Francescani, Matt Spetalnick and Mark Hosenball; Writing by Ellen Wulfhorst; Editing by Paul Thomasch, Grant McCool and Dan Grebler)