Think about those who perverted bin Laden's mind as a young man, the environment he grew up in, and those who poisoned him and turned him into the killer he became. Think of how his life might have turned out if he'd embraced peace instead of terrorism.
Think of those lives he might never have ended before their time, and the world we'd have had since 2001 if he'd never come close to causing 9/11. A more peaceful world. No DHS, no Patriot Act, no TSA, no body scans. People allowed to wear shoes and carry bottled water onto a plane.
Nobody fearing their neighbours just because they're a different skin colour. Bigotry on its way to becoming a thing of the past.
Celebrate the world where the things he has done are now in the past, and you have a far better future ahead of you. Celebrate all of that, and turn your mind to creating the conditions for peace to return to the world once more.
Peace.