James Kirchick, "The Deceits of Seymour Hersh," in Commentary.
Unfortunately, Hersh's sensationalism has allowed him to become part of the history of the last forty-odd years. Fortunately, his fame will fade alongside the passion over the issues about which he wrote (and lied). When future students encounter his name or work, historians will be well placed to summarily dismiss him, and the students won't care, because John Kennedy, and My Lai, and Abu Ghraib will be ancient history to them.
It is already happening. But feel free to use the evidence in Kirchick's article to help shuffle Hersh off into the obscurity he so deserves.