The Senate intelligence committee approved a long-awaited report ... concluding that harsh interrogation measures used by the CIA did not produce significant intelligence breakthroughs. The 6,000-page document ... is the most detailed independent examination to date of the agency's efforts to break" dozens of detainees through physical and psychological duress. Officials familiar with the report said it makes a detailed case that subjecting prisoners to "enhanced" interrogation techniques did not help the CIA find Osama bin Laden and often [was] counterproductive in the broader campaign against al-Qaeda. It could be months, if not years, before the public gets even a partial glimpse of the report or its 20 findings and conclusions. When that is completed, the committee will need to vote again on whether to release even a portion of the report, a move likely to face opposition from the CIA, which has fought to keep details of the interrogation program classified. Earlier this year, the Justice Department closed investigations of alleged abuses, eliminating the prospect that CIA operatives who had gone beyond the approved methods would face criminal charges. Civil liberties groups praised the report.