From Holden:

Canada nixes participation in the invisible space shield.

After declining to take part in the U.S.-led invasion of Iraq, Canada is just saying no again to its powerful southern neighbor, this time on the issue of taking part in a controversial anti-missile shield program.

After weighing the highly unpopular idea for more than a year, Prime Minister Paul Martin was expected to announce the decision as soon as today, Canadian news reports said.

Well aware that the move will cool U.S.-Canadian relations, which had started to warm somewhat after the U.S.-led invasion of Iraq, Martin advised President Bush at the NATO summit in Brussels, Belgium, U.S. officials confirmed.