There are differing explanations for the apparent collapse of the police force in Mosul. "The Guardian" quoted an anonymous US diplomat saying, "Mosul basically collapsed after he left." Former diplomat Peter Galbraith criticized Petraeus's command of the 101st, saying his achievements had been exaggerated and his reputation inflated. He wrote for "The New York Review of Books" that "Petraeus ignored warnings from America's Kurdish allies that he was appointing the wrong people to key positions in Mosul's local government and police." On the other hand, in the book "Fiasco", "The Washington Post" reporter Tom Ricks wrote that "Mosul was quiet while he (Petraeus) was there, and likely would have remained so had his successor had as many troops as he had—and as much understanding of counterinsurgency techniques." Ricks went on to say that "the population-oriented approach Petraeus took in Mosul in 2003 would be the one the entire U.S. Army in Iraq was trying to adopt in 2006." "Time" columnist Joe Klein largely agreed with Ricks, writing that the Stryker brigade that replaced the 101st "didn't do any of the local governance that Petraeus had done." Moving away from counterinsurgency principles, "they were occupiers, not builders." "The New York Times" reporter Michael Gordon and retired General Bernard Trainor echoed Ricks and Klein, including in their book "Cobra II" a quote that Petraeus "did it right and won over Mosul."