If the United States is safer today than it was 10 years ago, that doesn’t mean the nation and government overreacted to the Sept. 11, 2001, terrorist attacks. That’s the theme Charles Krauthammer pursues in his latest column.

The new conventional wisdom on 9/11: We have created a decade of fear. We overreacted to 9/11 — al-Qaeda turned out to be a paper tiger; there never was a second attack — thereby bankrupting the country, destroying our morale and sending us into national decline.

The secretary of defense says that al-Qaeda is on the verge of strategic defeat. True. But why? Al-Qaeda did not spontaneously combust. Yet, in a decade Osama bin Laden went from the emir of radical Islam, jihadi hero after whom babies were named all over the Muslim world — to pathetic old recluse, almost incommunicado, watching shades of himself on a cheap TV in a bare room.

What turned the strong horse into the weak horse? Precisely the massive and unrelenting American war on terror, a systematic worldwide campaign carried out with increasing sophistication, efficiency and lethality — now so cheaply denigrated as an “overreaction.”