The pact will provide early warning radar coverage from the Canada-United States border into the Arctic Get the Travel Insider newsletter for tips, deals, and inspiration from our global travel editor Get inspired with our free Travel Insider newsletter Get inspired with our free Travel Insider newsletter Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Australia and Canada have signed a $1.75 billion (£1.38bn) export