It isn't a matter of if we will see a preemptive strike from Israel, it is now a matter of when we will see it:
Prime Minister Benjamin Netanyahu offered a thinly veiled defense of a possible Israeli preemptive strike on Iran during a Knesset commemoration Tuesday of the 40th anniversary of the Yom Kippur War.
In a speech to MKs about the war, in which Israel was surprised by a coordinated Arab invasion on the northern and southern fronts, Netanyahu explained that IDF soldiers who fought in the bitter battles of that war “saved us from paying the price of complacency.”
Netanyahu added: “A preventive war, even a preventive strike, is among the most difficult decisions a government can take, because it will never be able to prove what would have happened if it had not acted. But the key difference between the  Six Day War and the  Yom Kippur War lies first of all in the fact that in the Six Day War we launched a preventive strike that broke the chokehold our enemies had placed on us, and on Yom Kippur the government decided, despite all warnings, to absorb the full force of an enemy attack.”
As talks over the Islamic Republic’s nuclear program began in Geneva, Israel delivered another not-so-subtle message to Iran about its military capabilities Monday night.
The Israeli Air Force conducted an unusually large exercise over the northern border and the Mediterranean Sea overnight. Military sources confirmed the exercise Tuesday morning.
“Recently, changes have taken place across the region,” a national security official told the Walla news site. “The IDF is deployed both near and far for these changes, and last night’s exercise was meant to signal the IDF’s serious intentions to deal with these problems and thwart them.”
“When talking about ‘all options on the table, it’s understood that these include military options,” the air force website wrote then. ”The IAF, the long arm of the IDF, is responsible for exercising the option if need be. To this end, soldiers in the squadrons of the force practice and reinforce the spectrum of skills, even in long-range flight. In this area of flying, the IAF must develop relevant operational capabilities, from focused activities to broader activities.”