Spending money on extra resources will not stop all such terrorist attacks but it will help to reduce the number of such attacks and increase the rate at which we capture these terrorists. As with most things in life it is a case of cost efficiency. How much do we consider a human life to be worth just in financial terms? Chances are that we will never be able to spend enough to make spending such large amounts of money worth while.
What to do if you're affected by the Intel Foreshadow flaw