Why? We ask the Mexicans to police their border. (They do - to help the illegals across... oh, well.)
The Canada Border Services Agency says it has intercepted 318 guns so far in 2005, below the more than 1,000 seized guns that border guards have averaged annually during the past five years, and far fewer than the 1,500 seized annually in the 1990s.
From the G&M, linked in post #1