Byline: ANDY LINES, US Editor, and JAMES HARDY, Political Editor
PRESIDENT George Bush last night vowed to rally the world to a "monumental struggle of good versus evil" in the aftermath of the US terrorist outrage.
Branding the attacks, which left up to 10,000 dead, an "act of war" he said the US would spend "whatever it takes" to bring the guilty to justice.
Bush, who will ask Congress to sanction huge funding, declared from the White House: "This battle will take time and resolve. But make no mistake about it, we will win."
He was backed by Tony Blair who called for the "machinery of terror" to be swiftly dismantled, and pledged Britain's full support.
Nato invoked its "one-for-all, all-for-one" declaration for the first time in its 51-year history.
It gives Bush the right to call for full Nato support if he decides to strike back against a foreign threat.
The FBI identified 12 suspects and held a number of men in armed swoops in Boston, Florida and Rhode Island yesterday.
Heading the list was US-trained pilot Mohamed Atta, 33, believed to have travelled on a United Arab Emirates passport.
Other arrests for the world's worst terror outrage are "imminent".
There was increasing evidence that wanted Saudi terror boss Osama bin Laden was behind the slaughter. He is said to have "bowed to Allah" on hearing the news.
The world is now bracing itself for massive retaliation aimed at eradicating the poison of terrorism. But it is not expected to come in the form of a single killer strike.
In Tuesday's attack, knife-wielding hijackers flew two airliners into the twin 110-storey towers of New York's World Trade Center which collapsed. Each could hold 25,000 people.
A third hijacked airliner was speared into the Pentagon in Washington, killing up to 800, and a fourth crashed in Pennsylvania. It may have been on its way to the presidential retreat at Camp David.
A few survivors have been pulled from the jungle of rubble and twisted metal at the WTC but hopes are fading. Last night, the remnants of a building in the area collapsed. No one was hurt.
Bush said: "The deliberate and deadly attacks which were carried out against our country were more than acts of terror. They were acts of war.
"This will require our country to unite in steadfast determination and resolve. Freedom and democracy are under attack.
"The American people need to know we're facing a different enemy than we have ever faced. This enemy hides in shadows and has no regard for human life.
"This is an enemy who preys on innocent and unsuspecting people, then runs for cover. But it won't be able to run for cover for ever.
"This is an enemy who tries to hide, but it won't be able to hide for ever. This is an enemy who thinks its harbours are safe. But they won't be safe for ever.
"This enemy attacked not just our people, but all freedom-loving people in the world. The United States of America will use all our resources to conquer this enemy. We will rally the world. We will be patient. We will be focused, and we will be steadfast in our determination.
"America is united. The …