HALIFAX, Dec 1: Canada on Wednesday dodged questions about joining the US anti-missile shield program, after President George Bush upped pressure on an issue that has boxed its government into a political corner.

"I hope we'll also move forward on ballistic missile defence cooperation to protect the next generation of Canadians and Americans from the threats we know will arise," Mr Bush said in a speech here on Wednesday.

Canadian Prime Minister Paul Martin told reporters he was not surprised that Mr Bush had brought up the issue here and in Ottawa on Tuesday - despite expectations in Canada, the issue was not on the agenda.

"Whatever we decide," said Mr Martin, "it will be in Canada's interests. We are a sovereign nation and we will make our own decisions on our airspace. "But we are opposed to the weaponization of space," Mr Martin said, minutes after seeing Mr Bush leave for Washington after an overnight visit to Ottawa and a side trip to Canada's Atlantic coast.

That formulation has been Canada's consistent position on the issue, as Martin's minority government tries to figure out how to handle what is a political hot potato.

Many experts believe a Canadian decision not to take part in the system could scupper the North American Aerospace Defence Agreement (NORAD) with Washington and make Canada blind to any threats entering its airspace.

Mr Bush said on Tuesday that he and Martin had "talked about the future of NORAD and how that organisation can best meet emerging threats and safeguard our continent against attack from ballistic missiles." -AFP