US President George Bush has been trying to rally support for America’s continued involvement in Iraq.In a major prime-time address to mark the first anniversary of the transfer of power, he rejected calls for American troops to be withdrawn. “The work in Iraq is difficult and dangerous. Amid all this violence, I know Americans ask, is the sacrifice worth it? It is worth it and it is vital to the future security of our country,” said Bush. The President argued against sending more troops to Iraq saying it would “undermine the strategy of encouraging Iraqis to take the lead in the fight”. But with his approval ratings at their lowest levels since he came to office, Bush badly needs the public to believe his reassurances. Polls suggest most people think his strategy will not lead to success.