While vigilance is always the first line of defense, installing a security scanner onto your PCs and Android mobile devices will help keep the bad guys out of your digital fortress.

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The pilots' lobby complains that current security measures are unreliable and contends that pilots are the last line of defense against hijackers' turning planes into guided missiles.

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"Our first line of defense, meaning the police, our hospital, EMS, our homeland security, they have done a tremendous job, " Lagafuaina said.

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