Is an Israeli airstrike on Iran's nuclear program imminent?

On this blog I want to post important news items that for some reason do not make the mainstream media. Following are excerpts from a WorldNetDaily article published on 2/3/07:

"Top Iranian Nuke Scientist 'Assasinated by Mossad'

US Intelligence says Israel making good on threat to stop bomb

The mysterious death last month of a top Iranian nuclear physicist involved with the Islamic Republic's current effort to enrich uranium was the work of Mossad, the Israeli security service, a leading U.S. intelligence company claims.

The death of Ardeshir Hassanpour, 44, a nuclear scientist, was not announced until Jan. 21, six days after his death, according to Radio Farda. The official cause of death was reported as "gas poisoning," but Iranian authorities did not disclose how or where Hassanpour was poisoned...

Israel had warned Tehran it would not be permitted to threaten the Jewish state with annihilation...

There is precedent for Mossad using assassination to interfere with efforts of its neighbors to acquire nuclear weapons.

It is believed by intelligence experts that three top scientists in Iraq's nuclear program were killed by Mossad before Israel launched the successful 1981 air strike that crippled the Osirak nuclear reactor."

Since there is an apparent precedent for Mossad assassinating top nuclear scientists before launching an attack on the nuclear reactor of a hostile neighbor, is the death of Hassanpour a precursor to an airstrike by Israel againt Iran?