Even the International Atomic Energy Agency, the U.N. nuclear watchdog, does not know where Iran keeps some vital equipment, like parts for centrifuges, the machines that enrich uranium. Israel could take out most of those sites by itself, military experts say, but it would be a risky operation involving repeated attacks and would have to deal with Russian-supplied anti-aircraft systems - although it managed to do so in far more limited strikes on Iran last year. A strike by the United States could probably cause more damage than an Israeli strike, but in either case you're talking about buying time and there's a real risk that it drives Iran toward rather than away from a bomb (Read more at AOL).