Pentagon Lockdown Lifted After Air Quality Tests Clear Facility
Pentagon lockdown lifted after air quality testing found no hazard.
Event / Security
Pentagon Air Quality Alert
Pentagon implements and lifts partial lockdown after air quality monitoring system triggers false alarm; subsequent testing confirms no hazard.
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2026-08-16 to 2026-11-13 · UTC publication dates
Coverage begins 12 Jun, 03:36 UTC
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What happened
Pentagon lifts lockdown after testing finds no hazard
Subsequent testing at the Pentagon confirmed no hazard existed, and normal operations resumed. Pentagon Chief Spokesman Sean Parnell confirmed the all-clear after additional testing verified the sensor alert was not indicative of an actual air quality hazard.
Arlington County Fire Department responds to Pentagon hazmat incident
The Arlington County Fire Department's hazardous materials team responded to the Pentagon to support the Pentagon Force Protection Agency's Hazmat Team during the air quality incident investigation.
Pentagon implements partial lockdown over air quality alert
The Pentagon implemented a partial lockdown with shelter-in-place procedures on multiple floors and hallways after building monitoring systems detected a potential air-quality issue. Pentagon officials locked down the affected areas while investigating the source and extent of the problem.
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