Shaffer is the former Vice President and current President of the London Center for Policy Research, a New York-based conservative think tank. At a banquet in September 2016, Shaffer presented Michael Flynn, a senior fellow at the center, with a leadership award. The center is named after its founder, Herbert I. London, a widely published social critic and one time Conservative Party candidate for mayor of New York. Shaffer ignited years of Pentagon and congressional investigations a decade ago with his charges that Defense Department suppressed the existence of his top-secret unit’s reports on the 9/11 plotters a year in advance of the attacks. The reason, he said in interviews, congressional testimony and a book, Operation Dark Heart, was that Defense Department officials didn’t want to be blamed for the intelligence failure that tarred other security agencies. The first edition of the book was bought up and pulped by the Pentagon even after reporters had received advance review copies of it. Shaffer’s publisher later issued a heavily censored edition.