texas faa tower evacuated due to odour; 100 flights delayed - air purifier

Vines in Texas
There are at least 100 flights in Dallas.
Fort Worth International Airport was delayed after some employees evacuated from government air traffic control facilities due to unknown smell.
The incident began late Thursday morning.
A Federal Aviation Administration spokesman said air traffic management continued at a slightly lower speed as employees entered and exited the building.
Air purifiers and fans are installed in the building.
No one got hurt.
The FAA website said flights arriving at DFW were delayed by about an hour on average. FlightStats.
At least 100 flights were affected, according to com.
The FAA did not say it expected the staffing of the DFW control center to return to normal, and the DFW was the main hub for American Airlines and its Eagle region subsidiary.