Without explanation, the Senate Intelligence Committee has decided to drop its investigation into the degree of access the producers of Zero Dark Thirty had at the CIA, Reuters reported on Monday. The film had drawn criticism for its suggestion that torture -- or enhanced interrogation -- produced information that helped lead to the hiding place of Osama bin Laden. In January California Senator Dianne Feinstein, chairman of the committee, and Arizona Senator John McCain, the leading Republican member, strongly criticized the film and asked whether its producers had been granted inappropriate access to classified CIA documents that supported their contention in the film that torture had been effective. While the film had received numerous pre-Oscar awards for director Kathryn Bigelow, star Jessica Chastain, and writer Mark Boal, it was virtually shut out at Sunday night's ceremony, receiving a single technical award for sound editing.