It was an invalid question.
I thought the analogy about the Pluto probe would clue you in, but abstraction has never been your strong suit.
To spell it out:
Your question, using the word "should" specifically, carries the implication that the U.S. military and intelligence services are not already doing whatever can be done to capture or kill bin Laden, or, as we have seen, people who work for him.
Notice that a number of people have complained about that attack, including people like Bowser who also complain that we're not going after bin Laden.
Answering your loaded question in any other way than "we're ALREADY doing that" would be idiotic.
That clear enough now, or do I have to get out the hand puppets?