From Reuters:

President George W. Bush's administration has crippled al Qaeda's ability to carry out major attacks on U.S. soil but at a political and economic cost that could leave the country more vulnerable in years to come, experts say.

Even as al Qaeda tries to rebuild operations in Pakistan, experts including current and former intelligence officials believe the group would have a hard time staging another September 11 because of U.S. success at killing or capturing senior members whose skills and experience have not been replaced.

"If the question is why al Qaeda hasn't carried out another 9/11 attack, the answer I think is that if they could have, they would have," said a former senior U.S. intelligence official who spoke on condition of anonymity.

Tighter U.S. airport security, greater scrutiny of people entering the United States and better coordination between the CIA, FBI and Department of Homeland Security also have made it harder for extremists to enter the country, experts said.

Home-grown extremists in the United States are believed to be isolated and lacking the will or ability to carry out large-scale operations.

If you don't think this could be turned into bad news about Bush, you don't know your Reuters news service very well. Read the rest.