Sy Hersh reports for The New Yorker:
It was here [in Nevada] that the Joint Special Operations Command (JSOC) conducted training, beginning in 2005, for members of the Mujahideen-e-Khalq, a dissident Iranian opposition group known in the West as the M.E.K.
…
The M.E.K.’s ties with Western intelligence deepened after the fall of the Iraqi regime in 2003, and JSOC began operating inside Iran in an effort to substantiate the Bush Administration’s fears that Iran was building the bomb at one or more secret underground locations. Funds were covertly passed to a number of dissident organizations, for intelligence collection and, ultimately, for anti-regime terrorist activities. Directly, or indirectly, the M.E.K. ended up with resources like arms and intelligence. Some American-supported covert operations continue in Iran today, according to past and present intelligence officials and military consultants.
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In a separate interview, a retired four-star general, who has advised the Bush and Obama Administrations on national-security issues, said that he had been privately briefed in 2005 about the training of Iranians associated with the M.E.K. in Nevada by an American involved in the program. They got “the standard training,” he said, “in commo, crypto [cryptography], small-unit tactics, and weaponry—that went on for six months,” the retired general said. “They were kept in little pods.” He also was told, he said, that the men doing the training were from JSOC, which, by 2005, had become a major instrument in the Bush Administration’s global war on terror. “The JSOC trainers were not front-line guys who had been in the field, but second- and third-tier guys—trainers and the like—and they started going off the reservation. ‘If we’re going to teach you tactics, let me show you some really sexy stuff…’ ”
Those MEK people trained by the U.S. are now allegedly working for the Israeli Mossad and are killing Iranian scientists. They still receive U.S. intelligence.
Most stuff in Hersh's story is well known. It was under Cheney and Rumsfeld that the MEK was trained for an attack on Iran. What is new is that the U.S. trained those people within the United States even while it officially maintained, and still does, that the MEK is a terrorist group.
That should raise some serious legal issues for those who arranged the training though it seems unlikely that an Obama administration will push for any consequences. Instead it is more likely that it uses those terrorists for its own purposes.