The Sept. 11 attacks transformed the Pentagon, ravaging the iconic building itself and setting the stage for two long and costly wars that reordered the way the American military fights. Hit the jump to read the rest of the story.
@WiL

Compared with a decade ago, the military is bigger, more closely connected to the CIA, more practiced at taking on terrorists and more respected by the American public. But its members also are growing weary from war, committing suicide at an alarming rate and training less for conventional warfare.

The partly gutted Pentagon was restored with remarkable speed after the hijacked American Airlines Boeing 757 slammed through its west side, setting the building ablaze and killing 184 people. But recovering from the strain of fighting in Iraq and Afghanistan will take far longer – possibly decades.

The Pentagon’s leaders will have to adjust to a new era of austerity after a decade in which the defense budget doubled, to nearly $700 billion this year.

The Army and Marine Corps in particular – both still heavily engaged in Afghanistan – will struggle to retrain, rearm and reinvigorate their badly stretched forces even as budgets begin to shrink. And the troops themselves face an uncertain future; many are scarred by the mental strains of battle, and some face transition to civilian life at a time of economic turmoil and high unemployment. The cost of veterans’ care will march higher.

As Robert Gates put it shortly before he stepped down as defense secretary this summer, peace will bring its own problems.

The problem was not peace on 9/11. At the time, the military was focused almost entirely on external threats. Air defenses kept watch for planes and missiles that might strike from afar; there was little attention to the possibility that terrorists might hijack domestic airliners and use them as missiles.

That changed with the creation of U.S. Northern Command in 2002, which now shares responsibility for defending U.S. territory with the Homeland Security Department.

Terrorism was not a new challenge in 2001, but the scale of the 9/11 attacks prompted a shift in the U.S. mindset from defense to offense.

HP