Terrorism is impossible to be stopped at all time. We will stop 99% of the attacks; 1% of the attacks will get through. You feel US has stopped all terrorist attacks? US is currently involved in Afghanistan and Iraq, where there are attacks every single day. On them. Not in US, but on them. The war has moved.
After terrorist attacks in Mumbai. http://www.youtube.com/watch?v=E1JtqHDxGDk http://indiatoday.intoday.in/story/mumbai-serial-blasts-difficult-to-stop-terror-attacks-all-the-time-says-rahul-gandhi/1/144774.html