the death toll topped 700. two million homes damaged or destroyed. we are on the scene of a rescue effort and with u.s. scientists right now who say this country is due for a massive earthquake as well. we're going to show you areas at risk. new twists in the case of a top ha mass operative killed by an apparent hit team in dubai. cnn learned two of the suspects later entered the united states. in one of chicago's roughest neighborhoods people are constantly looking around, fearing drive-by shootings but now the handgun ban is headed to the united states supreme court. i'm wolf blitzer. we want to welcome viewers in the united states and around the world. you're in "the situation room." rescuers are looking for signs of life in the rubble as chile digs out of a catastrophic earthquake. big city high rises in ruins. small towns are almost wiped off