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    Video: Giant Tunnel Boring Machine Completes 7 Extension - Photo Gallery

    arrow left Video: Giant Tunnel Boring Machine Completes 7 Extension
    Slide 1 of 3
    A "sandhog" crawls through the tunnel boring machine that just cut through the bedrock underneath the Port Authority bus terminal.

    <p>A "sandhog" crawls through the tunnel boring machine that just cut through the bedrock underneath the Port Authority bus terminal.</p>

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    <p>A "sandhog" crawls through the tunnel boring machine that just cut through the bedrock underneath the Port Authority bus terminal.</p>
    Gothamist
    Slide 2 of 3
    Sandhog Tommy Gramza, left, a tunnel boring machine mechanic sits on the machine's  gripper shield after another tunnel boring machine cut through the bedrock.

    <p>Sandhog Tommy Gramza, left, a tunnel boring machine mechanic sits on the machine's gripper shield after another tunnel boring machine cut through the bedrock.</p>

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    <p>Sandhog Tommy Gramza, left, a tunnel boring machine mechanic sits on the machine's gripper shield after another tunnel boring machine cut through the bedrock.</p>
    Gothamist
    Slide 3 of 3
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