Anti-war demonstrators make their voices heard as he addresses parliament US President George W. Bush's fleeting visit to Australia yesterday divided opinion in the country almost as much as the decision to send 2,000 Australian troops to Iraq earlier this year. Mr Bush's 20-minute address to the national parliament in Canberra was marked by protests both within and outside the chamber, with MPs threatened with ejection and police breaking up a demonstration that turned ugly. The president, whose 21-hour visit wrapped up a six-nation tour of Asia, used much of his speech to justify going to war in Iraq. He praised Prime Minister John Howard as 'a leader of exceptional courage' and drew laughter when he reminded MPs that he had recently referred to Mr Howard as 'a man of steel'. Quipped Mr Bush: 'That's Texan for fair dinkum.' But some MPs were less impressed, with two Greens senators interrupting his speech to protest at the 'occupation' of Iraq and the free-trade agreement being negotiated between Canberra and Washington. Both senators - Bob Brown and Kerry Nettle - were asked to leave the chamber but refused. Senator Brown shouted: 'We are not a sheriff' - a reference to recent remarks made by the president about Australia's role in maintaining security in Southeast Asia and the South Pacific. Senator Brown also expressed concern for two Australians alleged to be Taleban fighters who are being held in the US military detention centre in Guantanamo Bay, Cuba. Other legislators protested silently. One opposition Labor MP wore a white armband, while others refused to clap or stand at the end of Mr Bush's speech. Describing the relationship between Australia and the US as vibrant, Mr Bush said the two countries acted in Iraq 'to remove a grave and gathering danger'. But analysts said the address, the fourth delivered to the Australian parliament by a serving US president, contained few surprises. Rawdon Dalrymple, an ambassador to the United States in the 1980s, told ABC radio: 'It was all very predictable ... and didn't tell us anything we didn't know already.' Protesters booed the president when he arrived at the parliament building and chanted: 'Go home Bush.' One woman said she was not anti-American, but felt the war in Iraq was wrong. Andrew Wilkie, a former intelligence officer who resigned in March in protest at Australia's involvement in Iraq, told the demonstrators 'the whiff of criminal behaviour now hangs heavily over both [Bush and Howard's] administrations'. Later, up to 2,000 protesters marched from parliament to Mr Howard's official residence. The march turned violent when a small group of protesters tried to break through police barricades outside the United States embassy.