The New York Times reports the United States general who beat back Islamic extremists in Iraq in 2007 suggested on Wednesday that the battle against Islamic State jihadis would only succeed with the use of ground forces. Speaking a day after his commander, Gen. Martin E. Dempsey, the chairman of the Joint Chiefs of Staff, told the Senate Armed Services Committee that American ground troops might be needed in Iraq, Gen. Ray Odierno was careful not to specify that those ground troops had to be American. But he made clear that success would be dependent on the presence of forces from all of Iraq's sectarian groups. Airstrikes have halted the advance of the Islamic State, also known by the acronyms ISIS or ISIL, General Odierno, now the Army chief of staff, told journalists from four news organizations, including The New York Times, in what aides said were his first public comments on the current situation in Iraq. Ultimately, though, “you’ve got to have ground forces that are capable of going in and rooting them out,” he said, referring to the Islamic extremists.