I've no idea, really. Both borders are pretty much a joke. I suppose it might be something as simple as Canada having better roads than Mexico. Or it could be that there are more Arabs living in Canada than in Mexico, so a crossing by a few of them would be less suspicious than a crossing at Mexico.
However, perhaps you are referring to the guy who was caught crossing in Washington. I happen to live in Washington and know where he crossed. He crossed on a ferry that runs between Victoria and Port Angeles. I have no idea how he got caught (I read about it, but have forgotten). I imagine there was a good deal of good luck and maybe the terrorist was just an idiot, especially since most of the things he had could've been bought at a Radio Shack in the US.
But we're not talking about terrorists. We're talking about Mexican nationals and we're talking about how our southern border is so pathetic that there are large stretches where there isn't much, if anything, to even *mark the border*. You're trying to equate one or two terrorists sneaking into the US with hundreds of thousands of Mexican nationals doing the same thing. Yes, it is more dangerous in the short run for a couple of terrorists to get into the US across the northern border; but in the long run, it is *much* more dangerous for our country to be continually invaded by large numbers of foreigners across our southern border.
Finally, we have *caught* terrorists crossing the Canadian border, but how many have we caught crossing the Mexican border? Just because we haven't (so far as I know) caught any crossing in from Mexico doesn't mean that it isn't happening or that it won't happen in the future.
Tuor
The El Paso FBI is investigating an 18-year-old Juárez man who was detained Thursday night at the Paso del Norte Bridge with a detonator device for possible "attempted bombing and explosive law violations," FBI Special Agent Al Cruz said Friday.
"The suspect is a Mexican citizen in the custody of the INS on violations of U.S. immigration laws," Cruz said. "What the FBI is investigating is a bomb case."
Roberto J. Moreno, the suspect, allegedly also possessed the means to create false documents, officials said.
"The detonator was homemade, but the only thing it was missing to make it a bomb was explosive material," El Paso police Sgt. Al Velarde said.
Moreno was in custody Friday at the El Paso County Jail under $2,000 bond. Authorities did not provide any details about his background or what he planned to do with the device.
Although Moreno was stopped at 7:30 p.m., officials did not close the Paso del Norte Bridge until 9:30 p.m. -- two hours after the detonator was intercepted. They reopened it about two hours later.
"We are reviewing why the bridge wasn't closed sooner," Velarde said. "It was the El Paso Police Department that made the call to close the bridge as a safety precaution."
Detonator Led to Bridge Shutdown(Saturday archives)
For some reason you'll hear about Americans shutting down airports by running up down escalators but you aren't going to hear much about this kind of thing. This happened this last Friday.