Lack of resources?
Bah, there is only a lack of will to do it.
Russia has a secure border that is far longer than ours. There is no reason we cant secure our border as well.
Like I said earlier, the political step-n-fetches wont do what is necesary untill we have another disaster, and maybe not even then as their power-mongering has priority over the concerns and welfare of the American people.
I guess someone forgot to tell the Chechnians. Russia has a secure border in your dreams.