A 13-story residential tower block in Gaza city collapsed after it was hit by an Israeli airstrike, drawing vows of retaliation from Palestinian militants. Tensions in the region have escalated and the international community is calling for a de-escalation of violence. One of the main sources of growing unrest in recent days has been the possible eviction of several Palestinian families from their homes in the Jerusalem neighborhood of Sheikh Jarrah. CNN’s John Vause has more.