But Martin, speaking with reporters here, declined to say whether he was in favor of or against the United States' plans for an international missile defense system.

"We're talking about the defense of North America, and whether you agree with the missile defense, whether you think it's practically feasible or not -- the fact is when you're talking about the defense of North America, Canada has to be at the table," he stressed.

"We are responsible about protecting the northern half of North America, and we will fulfill that responsibility," Martin said.

Before being elected Liberal Party Leader -- the final step to his ascent to replace Prime Minister Jean Chretien who is retiring -- Martin had expressed lukewarm support for a United States plan to deploy land-based radar systems and interceptor missiles across North America.

"There's no doubt about the importance of security. It's not simply an American issue, it's a Canadian issue, as well, and we will exercise our responsibilities in that area," Martin said.

Under stage one of the US missile defense system, US President George W. Bush envisions placing some 20 interceptors in Alaska and at a California air base next September, ahead of the 2004 US presidential election.

In a policy report released by Martin, he says: "We must develop as a matter of priority a national security policy for Canada. This goes far beyond the border."

It would incorporate military and non-military efforts -- including internal security, intelligence, policing and emergency preparedness -- with a focus on "protecting our country against terrorist threats that emanate from beyond our shores."

Chretien's government held talks with US officials over the missile defense system beginning in May but had not committed to joining or rejecting it.

Chretien will discuss his departure date with Martin on Tuesday.

WAR.WIRE