Yesterday, Americans across the country came together in service and remembrance to mark the 15th anniversary of the 9/11 terrorist attacks. On one of the darkest days in our nation’s history, the Federal Aviation Administration helped bring every aircraft in the U.S. airspace safely to ground, and U.S. Merchant Mariners rushed to New York Harbor to help evacuate thousands who had sought refuge from the chaos of Lower Manhattan.

Former Secretary of Transportation Norman Y. Mineta explains how the Department of Transportation changed after 9/11:

Read Secretary Foxx’s blog commemorating 9/11 fifteen years later.