Israel Air Force 707 tanker refuels an F-15
According to news reports from Tel Aviv, the Israel Air Force is attempting to enhance and expand its air refueling capability. This comes as no surprise, given the ongoing Iranian nuclear weapons program. Israel has declared such a program as an "existential threat" to the state of Israel. (See my earlier Iran - "Existential Threat" to the State of Israel - ADDENDUM.)
If Israel plans any military action against Iran, it will need greater refueling capability that it has right now, and even that might not allow them to do what needs to be done to blunt the Iranian program.
In March, I wrote an analysis for MSNBC's Hardball (Iran - Israel's Air Strike Options) in which I stated that the Israeli Air Force does not have the capability to hit the approximately 1500 aim points required to effectively cripple key components of the Iranian nuclear enrichment program. I remain of that opinion.
That said, if Israeli leaders believe that the rest of the world will not address the Iranian program, then they have to. They may try the military option anyway.