>> what you're looking at is simply a blip on the radar. >> it has the earmarks of a tragic mistake. >> the united states will offer any assistance we can. >> we will do everything we can to determine what happened and why. >> we move to our other major story. >> when newspapers need two front pages. >> israel has officially become a ground offensive in gaza. >> they wanted to take out a network of tunnels hamas has been using to infiltrate the gaza strip. >> hamas said the infiltration would have dreadful consequences. >> the shooting down of that malaysian airliner. >> if evidence emerges that this was involved. >> this could be a game changer. the united nations international civil aviation organization warns commercial airlines about routes that could be unsafe to fly. the route taken by malaysian