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Into History.

com. It's 1936 in San Francisco.

It's 1936 in San Francisco.

Bridge builder Al-Zampa is several hundred feet in the air,

working on one of the towers that will eventually become the Golden Gate Bridge.

Today, Alan, his fellow workers are stringing up and bolting in the huge cables that will help

distribute the weight across the entire bridge.

Its slow, dangerous work involving many pairs of hands and a lot of coordination.

Up here in the mist, visibility is low.

The condensation makes everything damp and slippery, and there's no rigging to keep Al tethered to his post.

A sudden gust of wind could easily knock him off balance and there's little for him to grab

on to if that happens.

The only safeguard in place is a large net down at the base of the bridge, close to the rocks.

It stretches out 10 feet past the bridge's edge.

It should be able to catch anyone who has the misfortune of slipping, but with the wind, the

unpredictable weather and the height, that's not always a guarantee.

But Al understands the dangers of his job. Years of experience have made him comfortable working up high with nothing but his own hands to keep himself steady.

So confidently, Al moves toward the large crane being used to pull cables up to his workspace.

He needs to push it forward before he can complete his next task, so gingerly he steps around the crane to get a better grip.

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