As a matter of operational principle, I would agree that information should be shared.
I would go even further and say that I would be most concerned if they chose not to share that information. That would be something a prime minister would take up with a president, or someone in my position would take up with a John Ashcroft or a Tom Ridge, or whatever the case would be, if we believed that they had such information and were not willing to share it with their counterpart organizations in Canada.