WE have the capability to do it.
WE have the needed bunker-buster type bombs.
WE can fly over Iraq. It's not at all clear that Israel can.
ISRAEL is the one who faces immediate and furious and insane reprisals -- no matter who takes out the Iranian nuclear plants.
So it boils down to three options.
(1) We permit Israel to act as our surrogate and do the deed. Our help would be needed to get to Iran.
(2) We stop acting like pussies and we do it ourselves (at great immediate risk to Israel).
(3) We elect to do nothing and have nobody act like a surrogate, and Iran ends up with nukes.
What we should do is an open question, but I will bet you that I know exactly what we WILL do. Option #3. President Obama is simply not up to the job.
Bottom line! If there is an attack on Iran, which I hope there is not, then it sure as hell better be Israel and NOT America!