http://www.businessinsider.com.au/the-fbi-hatched-some-crazy-terror-plots-2013-3 http://www.businessinsider.com.au/the-fbi-hatched-some-crazy... It is difficul

http://www.businessinsider.com.au/the-fbi-hatched-some-crazy-terror-plots-2013-3 http://www.businessinsider.com.au/the-fbi-hatched-some-crazy... It is difficult to determine the efficacy of this strategy although of course it results in successful terrorist arrests.