Canada says its sanctions against Iran will remain in "full force," regardless of the deal worked out between Tehran and six other countries, including the United States and Britain, because Iran cannot be trusted to put its nuclear program on hold.

Canada and the United States share a joint continental air defense system designed to protect against nuclear and conventional attacks from hostile nations, and Canadians and Britons share a sovereign, Queen Elizabeth II. But officials in Ottawa don't share the faith in a negotiated solution demonstrated by President Obama and Her Majesty's government in London.

"Past actions predict future actions and Iran has defied the United Nations Security Council, and simply put, Iran has not earned the right to have the benefit of the doubt," Foreign Affairs Minister John Baird said Sunday.