Does this make the world a safer place?  I wouldn't be surprised if there are reprisals.  Would it have been better for the Americans to have kept quiet about his death and acted as if they hadn't realised that they'd killed him?  I expect that any remaining senior Al-Quaeda leaders wouldn't have wanted to advertise the fact that Bin Laden had been killed and so reprisals wouldn't have featured in their thinking.

I also wonder whether they could have taken him alive. I expect they could and if they could then why didn't they? It would have been interesting, if he had been brought to trial, to find out whether he really was responsible.  As others have said I don't trust the Americans.  There are still people imprisoned in Guantanamo, they've been there fr 9 years without trial, and they can't be tried because the evidence of torture by the Americans is too great. 
 

Obama has much more to lose in being found out in a lie - but don't think the conspiracy theorists have thought of that....
No, this doesn't make the world a safer place - just that Al Qaeda have lost their figure head - there are and were always going to be, plenty willing to step into his shoes, but I think it was important for Bin Laden to have been got....I also think it's a GOOD thing that he wasn't taken alive...yes there will be reprisals for his death...but further attacks are being planned all the time, all this does is give them what they'll see as "justification"...! If he'd been taken alive there would have been attacks to try and force his release....either way - dead or alive, there will always be more attacks!
It also sends out the message, as has been said, that no matter how long it takes to avenge - even nearly 10 years - they won't escape justice!!
I still see this as a good day!!