The Wall Street Journal thinks they are very close:

Last week, an extraordinary leak revealed the fact that Israel had conducted massive military exercises in the waters off of Greece. The significance should be obvious:

Those exercises - reportedly involving about 100 fighters, tactical bombers, refueling planes and rescue helicopters - were conducted about 900 miles west of Israel's shores in the Mediterranean. Iran's nuclear facilities at Bushehr, Isfahan and Natanz all fall roughly within the same radius, albeit in the opposite direction. The point was not lost on Tehran, which promptly warned of "strong blows" in the event of a pre-emptive Israeli attack.

The more important question is whether the meaning of Israel's exercise registered in Western capitals. It's been six years since Iran's secret nuclear programs were publicly exposed, and Israel has more or less bided its time as the Bush Administration and Europe have pursued diplomacy to induce Tehran to cease enriching uranium.

It hasn't worked. Iran has rejected repeated offers of technical and economic assistance, most recently this month. Despite four years of pleading, the Administration has failed to win anything but weak U.N. sanctions. Russia plans to sell advanced antiaircraft missiles to Iran and finish work on a nuclear reactor at Bushehr, though spent fuel from that reactor could eventually be diverted and reprocessed into weapons-usable plutonium. Chinese companies still invest in Iran, while the U.N.'s chief nuclear inspector, Mohamed ElBaradei, has repeatedly downplayed Iran's nuclear threat.