A top Iranian military commander is at the forefront of the Iraqi military’s biggest offensive yet against Islamic State militants in the country. Gen. Ghasem Soleimani, who previously played a role coordinating the counteroffensive against ISIS in June, when the militant group seized significant territory in northern Iraq, was overseeing at least part of the operation to recapture Tikrit, witnesses told Reuters on Tuesday. The Iranian commander, who leads the powerful Iranian Revolutionary Guard's Quds Force, is coordinating operations on the eastern flank of the offensive from Albu Rayash, a village captured from ISIS two days ago. "[Soleimani] was standing...