Pentagon reopens after air quality reports declared a false alarm

The Pentagon, the headquarters of the U.S. Department of Defense, reopened after an earlier evacuation prompted by reports of an air quality problem that was subsequently declared a false alarm. The incident led to the closure and evacuation of several floors of the building.

Pentagon spokesperson Sean Parnell explained that the morning report of an air quality issue, potentially involving hazardous materials, triggered immediate precautionary security measures and assessments. "Subsequent tests confirmed that there was no risk, and normal operations have resumed," Parnell stated via X, formerly Twitter. He also commended the swift response of emergency units.

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Subsequent tests confirmed that there was no risk, and normal operations have resumed.

Earlier, the building's security team had alerted occupants to an "air quality issue" and indicated that additional tests, expected to take one to two hours, would be conducted. "Response teams are deployed and prepared to assist building occupants if necessary. You may see response personnel from various agencies and precautionary measures in the central courtyard," the initial message read.

Following the alert, multiple floors and corridors within the vast military complex were evacuated and secured. Reports from U.S. media outlets described agents wearing gas masks and chemical protection suits at the site. The incident occurred as Washington D.C. was enhancing security for upcoming Flag Day celebrations and in anticipation of President Donald Trump's 80th birthday.

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Response teams are deployed and prepared to assist building occupants if necessary. It is possible that you will see response personnel from various agencies and precautionary measures in the central courtyard.