The great investigative journalist Seymour Hersh, in two previous articles in the London Review of Books («Whose Sarin?» and «The Red Line and the Rat Line») has reported that the Obama Administration falsely blamed the government of Syria’s Bashar al-Assad for the sarin gas attack that Obama was trying to use as an excuse to invade Syria; and Hersh pointed to a report from British intelligence saying that the sarin that was used didn’t come from Assad’s stockpiles. Hersh also said that a secret agreement in 2012 was reached between the Obama Administration and the leaders of Turkey, Saudi Arabia, and Qatar, to set...