March 7: New video of midair attack. Americans kidnapped in Mexico. California digging out from record snow. Passenger safety in the spotlight.

<p>A passenger attempted to stab a flight attendant and open the emergency door mid-flight from LA to Boston. Also, four Americans kidnapped in a Mexican border city as the FBI is now offering a reward for any information leading to their return. Plus, emergency crews now going door-to-door to reach residents in California trapped by record snow. And, passenger safety in the spotlight amid new details on turbulence incidents and runway collisions.</p>