First of all wily,the majority of those 17 terrorists were indeed Canadian citizens,5 under 18 years old,the rest ranged from 23 to 47.Chances are,only those 5 would possibly have been born here.The others emmigrated here,and would not have valid Canadian birth certificates.Secondly...They make it quite hard to get a passport here,and it costs about $150.00 .Thirdly....a lot of people will just decide not no come there anymore.You will lose mega tourist $ in new york,illinois,washington and florida to name a few. You might not care,Bush might not care,but the people that rely on us for their paychecks certainly will.We are not a threat. Its just anal protectionism.