Top administration source says Obama instructed Defense Secretary to work with Defense Minister Barak, to give all due consideration to the request for purchasing GBU-28 bombs, advanced refueling aircraft.
Prime Minister Benjamin Netanyahu requestedthe United States approve the sale of advanced refueling aircraft as well as GBU-28 bunker-piercing bombs to Israel during a recentmeeting with Defense Secretary Leon Panetta, a top U.S. official said on Tuesday.
The American official said that U.S. President Barack Obama instructed Panetta to work directly with Defense Minister Ehud Barak on the matter, indicating that the U.S. administration was inclined to look favorably upon the request as soon as possible.
During the administration of former U.S. President George Bush, the U.S. refused to sell bunker-penetrating bombs and refueling aircrafts to Israel, as a result of American estimates that Israel would then use themto strike Iran's nuclear facilities.
http://www.haaretz.com/news/diplomacy-defense/netanyahu-asked-panetta-to-approve-sale-of-bunker-busting-bombs-u-s-official-says-1.416900

Great

US offered Israel advanced weaponry in exchange for delaying Iran ...
http://m.nypost.com/p/news/international/attack_offered_israel_advanced_weaponry_vJzadL8Qw5XoQ7akSRO9yK
Report: US offered Israel new arms to delay Iran attack
http://www.dawn.com/2012/03/08/report-us-offered-israel-new-arms-to-delay-iran-attack.html

No one - From the Saudi's to Iraqis to Americans want Iran to have
the bomb and for Israel whom the Iranians have sworn to kill in an
act of genocide - it is a matter of survival for their entire country.

The Israelis who are continually attacked violently by their
neighbors simply because of their existence, have had to arm themselves
and train to a constant state of military readiness just to survive.
So many have helped Israel defend themselves from this religious
persecution and they have prospered as a free and open democracy
under the most extremely difficult circumstances. I admire them.