Ask The Pilot: Malaysia Airlines Flight 370

A MAS plane is seen on the tarmac on March 11, 2014 in Kuala Lumpur, Malaysia. Officials have expanded the searh area for missing Malaysia Airlines flight MG370.

It's been a week since Flight 370 disappeared en route to Beijing. Patrick Smith, an airline pilot who blogs at, and author of  Cockpit Confidential: Everything You Need to Know About Air Travel (Sourcebooks), talks about what is known and unknown about the flight and the search, and takes your calls and questions.