According to the New York Post, Obama offered Netanyahu advanced weaponry in exchange for his commitment to wait until 2013 to strike Iran’s nuclear facilities:
WASHINGTON — The US offered to give Israel advanced weaponry — including bunker-busting bombs and refueling planes — in exchange for Israel’s agreement not to attack Iranian nuclear sites, Israeli newspaper Maariv reported Thursday.
President Obama reportedly made the offer during Israeli prime minister Benjamin Netanyahu’s visit to Washington this week.
Under the proposed deal, Israel would not attack Iran until 2013, after US elections in November this year. The newspaper cited unnamed Western diplomatic and intelligence sources.
(h/t: NRO)
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UPDATE: I correct from the source to the New York Post.