Professor Hansman said the existing evidence suggested that mechanical failure did not lead to the crash but that the pilot was most likely responsible.

汉斯曼表示，现有的证据显示，并非技术上的故障导致飞机坠落，而很有可能是飞行员的责任。

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"A lot of people believe their career will end if they seek treatment, " Hansman said.

MSN: Panel calls for annual PTSD screening

No matter how trustworthy the technology becomes, Hansman said remote-controlled airliners will never become reality without widespread public acceptance.

CNN: Who's really flying the plane?

Jason Hansman, the group's membership director, said the stigma of seeking treatment is even more prevalent among those on active-duty.

MSN: Panel calls for annual PTSD screening