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US Department of Homeland Security:

 

More here:

Video collection- DHS checkpoints

 

DHS checkpoints shut down in Jefferson County WA:

Federal Policy No Longer Enforced at the Local Level?

 

State and local LE agencies do not conduct DUI/suspicionless checkpoints in Washington State.

DUI checkpoints elsewhere in the US:

 

 

 

Photo-

Platoon 3049, MCRD San Diego

Jun-Sep 1979