From the History Commons Groups blog:

Numerous new entries have been added to the Complete 9/11 Timeline at History Commons, many of which deal with the US military's actions around the time of--and in response to--the 9/11 attacks, while other new entries provide important information about the military's responses to suspicious aircraft prior to 9/11.

New timeline entries describe how NORAD--the military organization responsible for defending US airspace--regularly launched fighter jets in response to suspicious aircraft in the years before 9/11, with fighters able to take off within minutes of a scramble order.

"In some cases, the facts published in this book, as told to her in interviews with airmen and airline pilots who were involved, differ markedly from the account in The 9/11 Commission Report," retired Air Force Maj. Gen. Larry Arnold, the commander of 1st Air Force in Panama City on Sept. 11, said in "Touching History."
"After reading this book, you decide," Arnold wrote."

Who Is? Larry Arnold
http://visibility911.com/jongold/?p=159

Pilot Adds Perspective To Sept. 11 Attacks

By TED JACKOVICS
The Tampa Tribune
Published: June 8, 2008

Updated:

"Touching History: The Untold Story of the Drama That Unfolded in the Skies Over America on 9/11," by Lynn Spencer (Free Press, $26)

The late U.S. Army Col. Milton "Bud" Halsey once shared his thoughts on how Cold War air defense units would have responded in an attack on the United States.
"You never know how individuals will react in combat," said Halsey, a Bronze and Silver Star-decorated veteran of two wars. "You have to wait until they take some hits. You won't know how well they will perform until you learn how they respond to casualties."