Iraqi Military Attempts to Retake Tikrit from the Islamic State

Some 30,000 Iraqi soldiers and volunteer militia began an offensive today designed to expel ISIS, the so-called Islamic State from the city of Tikrit. It's seen as a key test in advance of a much larger campaign to re-take the city of Mosul. The Pentagon has talked about the upcoming offensive in Mosul, but says it has nothing to do with today's assault on Tikrit.