Pentagon gives all-clear after lockdown over air quality alarm

The Pentagon went into lockdown Thursday over an air quality issue, prompting the department to execute a shelter-in-place order for the affected area.Pentagon spokesperson Sean Parnell said at 1:31 p.m. EDT: "Subsequent testing confirmed no hazard exists, and normal operations have resumed." Parnell said two hours earlier that the Pentagon was executing "standard protection protocols" [...]