Obama's address

Today, when I heard about the news of death of Osama bin Laden, the phrase "justice has been done" sounded a bit... incongruous to me. Even if he is responsible for mass murder & the cruelest terrorism, does a murder could be the justice ? But President Obama's statement was excellent, impressive, would made the opponents hold their tongue. I won't debate on US's means of war against terrorism, I was just impressed by the power of his words.
Word is a double-edged sword, it can say anything, prove almost everything. So it's not important if the subject is provable or not, the important thing is HOW it is proved, I think.
And on such difficult matter, words really works.