Via this comes this CBC interview with Janet Napolitano of the Department of Homeland Security:
Napolitano: ...Nonetheless, to the extent that terrorists have come into our country or suspected or known terrorists have entered our country across a border, it's been across the Canadian border. There are real issues there.
(Neil Macdonald of the CBC): Are you talking about the 9/11 perpetrators...
A trio of stooges are here to show how not to ask Ann Coulter - or anyone else - questions. I don't necessarily want to have anyone discredit Ann Coulter by asking her the right question in the right way, but, given at least the first two there isn't much danger of that.