If this is true it's leaking now for a reason. And if Bush truly denied permission there would be an attack on Iran there will be an attack on Iran.

"Israel gave serious thought this spring to launching a military strike on Iran's nuclear sites but was told by President George W Bush that he would not support it and did not expect to revise that view for the rest of his presidency, senior European diplomatic sources have told the Guardian."

They need this radar right away because? It's not as if Iran is acting hostile, staging military exercises which duplicate an attack on Israel, or otherwise acting hostile. The rhetoric is the same both ways, the action in bombing neighbors and in general being a rogue nation is all Israeli.

"U.S. installs early-warning radar in Israel to warn against Iran attack."

"So, giving the go ahead to Israel would just not be worth it.

"But none of this changes the fact that Israel - on its own, without U.S. complicity - is moving closer to a decision to attack Iran, almost by the day."