Why Did Navy Staffers at the Pentagon Fail to Respond to the Attacks on the World Trade Center on 9/11?

The Pentagon on September 11

"Readiness is the name of the game and the ability
of our people to respond is the second part of it."

- Admiral Robert Natter, commander of the U.S.
Navy's Atlantic Fleet on September 11, 2001 [1]

Navy personnel at the Pentagon on the morning of September 11, 2001, including some key officials, appear to have acted with a surprising lack of urgency after they learned of the terrorist attacks on the World Trade Center.

Even though the Navy--along with the rest of the United States military--was responsible for protecting America if it was under attack, its personnel at the Pentagon seem to have done nothing, or very little, to help defend the country after they learned of the plane crashes at the World Trade Center. Remarkably, many of them continued with their normal work duties as if nothing unusual had happened. Furthermore, the Navy's top officials appear to have issued no orders to their personnel, regarding what to do in response to the crashes.

Navy Prosecutor Admits Flight 93 Shot Down

"If they hadn't shot down the fourth plane it would've hit the dome," Stone, a Navy officer, said in his opening remarks.

Bin Laden driver knew 9/11 target: prosecutor
Wed Jul 23, 2008 4:33am EDT

Hat tip to "Alfred Joe's Boy" at Rigorous Intuition forum:

The Navy Jets That Never Arrived on 9/11

According to the 9/11 Commission Report, "On 9/11, the defense of U.S. airspace depended on close interaction between two federal agencies: the FAA [Federal Aviation Administration] and the North American Aerospace Defense Command (NORAD)." NORAD in particular is tasked with defending the airspace over North America and protecting the continent. The attacks on 9/11 all took place within its Northeast Air Defense Sector (NEADS), which, according to the 9/11 Commission, was able to call upon two 'alert' military sites for assistance: Otis Air National Guard Base in Cape Cod, Massachusetts and Langley Air Force Base in Hampton, Virginia. Each of these had just one pair of fighter jets at the ready. "Other facilities, not on 'alert,' would need time to arm the fighters and organize crews." [1]