That would take around 3520 snipers according to my calculation.
so we can have over a 100,000 boots on the ground in Afghanistan but 3,520 is too many for our own border?
since 9/11:
-total Americans dead - 8,900
-total Americans wounded or injured - 48,000
-total American casualties - 56,900
http://en.wikipedia.org/wiki/War_on_terror#Casualtiesand those are the numbers that they actually tell us about. and those numbers don't take into consideration all the families that have been torn apart as a result of the death and/or life-altering injuries. they don't take into consideration the fact that Iraq/Afghanistan veterans lead the country in suicides by a long shot. they don't take into consideration all the lives that have been destroyed by PTSD, whether it be soldiers themselves, or the effects on those who care about them.
and you're frowning upon a number like 3,520 and implying that it's unrealistic.