Well no shit, dumbass.

A senior Iranian military official says experts have determined the United States and Israel were behind a mysterious computer worm known as Stuxnet that has harmed Iran's nuclear program.
Gholam Reza Jalali says investigations by Iranian experts show that Stuxnet originated from the U.S. state of Texas and Israel.
Jalali heads a military unit called Passive Defense that primarily deals with sabotage. His comments were reported Saturday by Iran's official IRNA news agency.

*****

Let's see, plant a worm that will cause the units to fail or self destruct and possibly letting you kill off your own population or risk the lives of hundreds if not hundreds of thousands of American and Israelis?
Hmmm.......
Remember Tehran, 1979? 444 days of your bullshit? And that ain't nothing compared to what you've sworn WILL happen if you develop nuclear weapons.