As scary as the idea may sound, the Israelis may not be bluffing. Their defense experts display no doubt whatsoever that Israel's Air Force can cripple Iran's nuclear program if necessary. The trick, they say, is to go after the system's weak spots. "You need to identify the bottlenecks," says a senior Israeli military source, asking not to be named for security reasons. "There are not very many. If you take them out, then you really undermine the project." Shlomo Brom, a former Israeli armed forces chief of strategic planning, says the destruction of two or three key facilities would...