"under tenet" is correct and usable in written English
It is used to refer to something that is obligatory or follows a particular rule or principle. For example, "We must follow the company's policies under tenet."
Today, under Tenet ownership, both are stronger than ever.
This assessment stands as one of two chief failures of the C.I.A. under Tenet (the other being the agency's lack of tactical intelligence about the September 11th plot).
Under Tenet, the C.I.A. took the lead role in fighting terrorism, and its officers became the jailers, and sometimes the tormentors, of many U.S.-held detainees.
Brennan and Miscik rose in the CIA ranks under Tenet and left when he was replaced by former congressman Porter J. Goss (R-Fla)., Hayden's predecessor.
Yet the intelligence community has also incurred some notable public failures under Mr. Tenet.
The Senate found that the flotilla of intelligence agencies under Mr Tenet, the director of central intelligence, were gullible and incompetent, reflecting a "broken corporate culture and poor management".
But the report released Tuesday included new details about what it calls a strained relationship between the C.I.A. under Mr. Tenet and the National Security Agency, which was then led by General Hayden.
Mr. Krongard, a former chairman and chief executive of Alex. Brown, the investment banking concern, took the post in 2001 under Mr. Tenet after joining the agency in 1998 as his counselor.
Some of what the C.I.A. under Mr. Tenet assured Congress about its full sharing of intelligence on suspected weapons sites in Iraq with United Nations inspectors there in 2002 and 2003 turned out to be "factually incorrect," the committee said.
While many of the C.I.A.'s successes in the field under Mr. Tenet remain secret, it is clear, for example, that the agency has played a critical role in dealing with one of the most pressing post-cold-war issues, terrorism.
Under Mr. Tenet, the C.I.A. has been the subject of blistering critiques for what its detractors have called the two worst intelligence failures of the last 50 years: not anticipating Sept. 11 and exaggerating the threat of Iraq's unconventional weapons.
