I learned about this incredibly frightening story from my friend Nikki,

http://www.policestateusa.com/2014/manhunt-car-to-car-searches/

There was “a lot of yelling, a lot of orders being given, helicopters, dogs barking, sirens, police cars driving by,” said eyewitness Carlton Higdon to WJLA.

Miles of cars were stranded and motorists were confined to their vehicles, with no explanation, for over an hour.  Confused people exiting their vehicles were met with hostility from the police.   WTOP reported that one woman leaned out her door to vomit, she was shouted at by cops to close her door.

“It’s just awful,” motorist Carmel Desroche to WJLA, describing the traffic jam.  “I’ve never seen both directions of 270 like this before.  It was painful.”

While stuck in traffic, motorists were approached by armed agents and ordered at gunpoint to submit to warrantless searches of the interior of their vehicles.  The Washington Post interviewed an innocent driver named Don Troop who experienced the ordeal