I imagined there were still secrets in Nature that the limited power of my equipment prevented me from knowing.

VOA: special.2009.07.18

Yes and if I could have, I would have prevented her death.

VOA: special.2010.07.31

Looking for evidence that their report is borne out by actual events, I found a list of prevented school attacks.

FORBES: Searching For Hard Data On Guns And Violence

Now I'll be working on that in the next few months and I can see a way forward because what prevented an agreement was suspicion and fear and forms of protectionism that I think we've got to get over.

BBC: Take your politics too seriously

And as I said, the Recovery Act prevented a lot of layoffs and really patched holes in a lot of school budgets.

WHITEHOUSE: President Obama Holds a Town Hall in New Hampshire