Israel enters first stages of Gaza City assault

NBC News has confirmed that Israel has entered the first stages of its planned assault on Gaza City. An Israeli military official says it happened after a clash with Hamas. That official also says Israel's military already has a hold on the outskirts of the city.It comes just hours after Israel said it would call up 60,000 reser for the Gaza city offensive. That is in addition to the 70,000 already serving. Let's get right to NBC News international correspondent Danielle Hamjin.Danielle, what more do we kno ...