This is what I've been thinking.  I think the window for a surprise attack has come and gone.  The new moon period was last week.  Next one won't be until Sept 11th........which will be too late.  I think Obama is preventing the attack, which makes sense since he is a muslim.

Bolton:
Obama won't strike Iranian nuclear reactor

Israel has only mere days to launch an attack on Iran’s Bushehr nuclear reactor if Russia makes good on its plan to deliver fuel there this weekend, former US ambassador to the UN John Bolton warned Tuesday.

He said that once Russia has loaded the fuel into the reactor -- slated for Saturday – Israel would no longer be willing to strike for fear of triggering widespread radiation in an attack.

“This is a very, very big victory for Iran,” Bolton told The Jerusalem Post. “This is a huge threshold.”

Putin pushes ahead with fueling up Iran's reactor Saturday

Russian Prime Minister Vladimir Putin decided it was safe to go ahead and load Iran's first nuclear reactor with fuel on Aug. 21 - effectively making it active - after the Kremlin's weekend announcement of this intent seemed not to trouble the US and Israel, debkafile's sources in Moscow and Tehran report. He decided the two governments had either been caught flatfooted or come to terms with a Russian-sponsored nuclear project that would allow Iran to produce weapons-grade plutonium.

The impression Russian officials tried to convey that the reactor would only go on stream in late September was meant to deflect US or Israeli pressure, which in the event was not forthcoming.

Monday, Aug. 16, therefore, Moscow further announced that Sergei Kirienko, the head of the Russian state nuclearcorporation Rosatom, would visit Bushehr Friday, Aug. 20, to see for himself how far the work on the 1,200-1,300 MWe reactor had progressed. He expects to be accompanied by Russian Energy Minister Sergei Shmatko.