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A woman walks past a banner filled with signatures and well-wishes for all involved with the missing Malaysia Airlines jetliner MH370 at the Kuala Lumpur International Airport, Sunday, March 16, 2014 in Sepang, Malaysia. Malaysian authorities Sunday were investigating the pilots of the missing jetliner after it was established that whoever flew off with the Boeing 777 had intimate knowledge of the cockpit and knew how to avoid detection when navigating around Asia. (AP Photo/Wong Maye-E)
A woman walks past a banner filled with signatures and well-wishes for all involved with the missing Malaysia Airlines jetliner MH370 at the Kuala Lumpur International Airport, Sunday, March 16, 2014 in Sepang, Malaysia. Malaysian authorities Sunday were investigating the pilots of the missing jetliner after it was established that whoever flew off with the Boeing 777 had intimate knowledge of the cockpit and knew how to avoid detection when navigating around Asia. (AP Photo/Wong Maye-E)

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    Families of missing passengers hope

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Families of missing passengers hope

Some are desperate for credible information, others cling to possibility that those on board are still alive.

Families of missing passengers hope

Some are desperate for credible information, others cling to possibility that those on board are still alive.