Pulitzer Prize-winning journalist Seymour Hersh accused the Obama administration ... of having cherry-picked intelligence" regarding the Aug. 21 chemical attack in Syria that served as evidence for an argument in favor of striking President Bashar Assad's government. Though President Barack Obama eventually decided not to strike Syria, the administration made a public case for war by saying that Assad's regime was responsible for a poison gas attack in the outskirts of Damascus. The U.N. later concluded the attack had involved the nerve agent sarin. In his piece -- titled "Whose Sarin?" -- Hersh reported that al-Nusra, a jihadi group fighting in Syria's long-running civil war, had also "mastered the mechanics of creating sarin and was capable of manufacturing it in quantity." Therefore, he wrote, "Obama did not tell the whole story" when stating with certainty that Assad had to be responsible, crossing a so-called "red line" that would trigger U.S. retaliation. Hersh is a freelancer, but he's best known these days for his work in The New Yorker, where he helped break the Abu Ghraib scandal in 2004. In an email, Hersh wrote that "there was little interest" for the story at The New Yorker. Hersh then took the story to The Washington Post. Hersh wrote that he was told by email that Executive Editor Marty Baron decided "that the sourcing in the article did not meet the Post's standards." Hersh [then] sent the Syria story to editors at the London Review of Books, LRB Senior Editor Christian Lorentzen [said]. Lorentzen said the piece was not only edited, but thoroughly fact checked by a former New Yorker fact checker who had worked with Hersh in the past.