Why were the boston terrorists IGNORED, the warnings
IGNORED, and they were let in without passports???
Answer: the same reason US troops cannot fight back
and the borders are wide open.
Our ruling class is only human. You can't reasonably expect the NSA to track everything a few Chechen terrorists say and do, not when they are swamped keeping track of everyone on FR, every Christian, every American with prior military service, every NRA member, and every other potential terrorist that Obama has told them takes precedence over a few immigrants who might produce a man-caused disaster or two.
Note to my personal NSA monitor: I think you're doing a great job, and I'm glad you are essential and didn't get furloughed. Can you tell me what my wife might want for Christmas?