WEBVTT

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>> One of the most important things an agent learns to do

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in the Border Patrol is to track and ###make signs.

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On the Southern border, dirt's there all the time.

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They cross over the border, you track it.

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And there's ways to tell the age of it.

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On the Northern border, the terrain is different.

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There's, you know, there's trees, there's leaves on the ground,

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all sorts of different effects, stuff that affects how signs left.

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When the snow falls, it makes it easier for us

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because we can actually see the sign.

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And you can age it, because if you see a sign today

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and it hasn't snowed in a while, you know it's within a few days.

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But if it snowed recently and it's real fresh,

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you know it's within the last snowfall.