President George Bush will have spent more than $1 trillion on military adventures by the time he leaves office at the end of next year, more than the entire amount spent on the Korean and Vietnam wars combined.

There are also disturbing signs that Mr Bush is preparing an attack on Iran during his remaining months in office. He has demanded $46bn (£22.5bn) emergency funds from Congress by Christmas and included with it a single sentence requesting money to upgrade the B-2 “stealth” bomber.

Rep. Dennis Kucinich says he is so concerned about what he sees as the Bush administration’s push for a war with Iran that he is considering using a parliamentary measure to force the House of Representatives to vote on impeaching Vice President Dick Cheney.

The largest protest so far during US President George W. Bush’s visit to Sydney ended peacefully Wednesday, but police predicted a “full-scale riot” later in the week.

About 300 students, many still in their high school uniforms, marched through central Sydney chanting anti-war slogans in protest at the US leader’s presence in Australia for this week’s Asia-Pacific summit.

The Bush administration opposed in U.S. court on Friday an effort to peel back a secrecy lid over its domestic counterterrorism wiretapping program, which critics say infringes on privacy and rights.

“The public disclosure of the documents the ACLU requests would seriously compromise sensitive sources and methods relating to the collection of intelligence necessary for the Government to conduct counterterrorism activities.”

President Bush gave warning last night that Iran’s pursuit of the atomic bomb could lead to a nuclear holocaust in the Middle East, and promised to confront Tehran “before it is too late”.

Mr Bush’s remarks, the starkest warning that he has made about Iran’s nuclear ambitions, came hours after President Ahmadinejad of Iran said that a power vacuum was imminent in Iraq and that Tehran was ready to fill it.