The BEST episodes written by Fiona Murch
#1 - Clear The Skies: 9/11 Air Defense
BBC Documentaries - Season 2005 - Episode 38
The documentary Clear the Skies explains how in the aftermath of the attack on the World Trade Center, fighter pilots were sent into the sky to ground every plane that was in the air. There were nearly 5,000 aircraft in the air that needed to be brought back down to the ground. The film includes interviews with pilots and government officials.