Anxious wait for families of missing Malaysia plane passengers

Malaysian officials have been joined by international intelligence agencies as the investigation widens over the disappearance of a Malaysia Airlines flight carrying 227 passengers and 12 crew members. The plane vanished between Kuala Lumpur and Beijing in the early hours of Saturday. Most of the passengers on board the flight were from China and their relatives are waiting anxiously for news. Al Jazeera's Rob McBride reports from Beijing.