Houston’s often bustling airports recently came to a silent halt for a very important reason.

The Transportation Security Administration (TSA) held a commemoration event on Friday, Sept. 11 at both George Bush Intercontinental and William P. Hobby airports.

The ceremony marked the 19th anniversary of the September 11 terrorist attacks, with the TSA being created shortly after the catastrophic events to secure the nation’s transportation systems.

To mark the anniversary, the TSA’s honor guard led a moment of silence followed by the national anthem.