22 April Washington Post commentary - Make No Mistake: This Is War by Secretary of Homeland Defense Michael Chertoff.

As the rubble of the Twin Towers smoldered in 2001, no one could have imagined a day when America's leaders would be criticized for being tough in protecting Americans from further acts of war...

Since Sept. 11, a conspiracy-minded fringe has claimed that American officials plotted the destruction. But when scholars such as Zbigniew Brzezinski accuse our leaders of falsely depicting or hyping a "war on terror" to promote a "culture of fear," it's clear that historical revisionism has gone mainstream.

Brzezinski stated the obvious in describing terrorism as a tactic, not an enemy ["Terrorized by 'War on Terror,' Outlook, March 25]. But this misses the point. We are at war with a global movement and ideology whose members seek to advance totalitarian aims through terrorism. Brzezinski is deeply mistaken to mock the notion that we are at war and to suggest that we should adopt "more muted reactions" to acts of terrorism.

The impulse to minimize the threat we face is eerily reminiscent of the way America's leaders played down the Ayatollah Khomeini's revolutionary fanaticism in the late 1970s. That naive approach ultimately foundered on the kidnapping of our diplomats in Tehran.

A sensible strategy against al-Qaeda and others in its ideological terror network begins with recognizing the scope of the threat they pose. Al-Qaeda and its ilk have a world vision that is comparable to that of historical totalitarian ideologues but adapted to the 21st-century global network.

Is this actually a war? Well, the short answer comes from our enemies. Osama bin Laden's fatwa of Feb. 23, 1998, was a declaration of war, a self-serving accusation that America had somehow declared war on Islam, followed by a "ruling" to "kill the Americans and their allies -- civilians and military . . . in any country where it is possible to do it."...