[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/images/05/12/art.cheneys0512.gi.jpg caption="Liz Cheney traveled to the Middle East with her parents in March 2008."]
WASHINGTON (CNN) - Waterboarding was not used to produce intelligence that linked Iraq to al Qaeda in the run-up to the war in Iraq, former Vice President Dick Cheney's daughter said Sunday.
A former top State Department official, Lawrence Wilkerson, told CNN last week that finding a "smoking gun" linking Iraq and the al Qaeda terrorist network became the main purpose of the "alternative" interrogation program the Bush administration authorized in 2002 - a program critics say amounted to the torture of prisoners in American custody.
But Liz Cheney, who served in the State Department during the Bush administration, told ABC's "This Week" on Sunday that "Nobody who is talking about this in the press has any knowledge of specific detainee treatment."
"The people that claimed to have been waterboarded in these articles are not any of those people," she said.
Wilkerson, a retired Army colonel, was former Secretary of State Colin Powell's chief of staff during the Bush administration's first term. Since leaving office, he has become an outspoken critic of the war in Iraq.
In an online essay Thursday, he wrote that al Qaeda captive Ibn al-Shaykh al-Libi was "waterboarded" by Egyptian intelligence until he told interrogators that Baghdad trained terrorists to use chemical and biological weapons - a key element in the Bush administration's case for the 2003 invasion of Iraq.
But Liz Cheney told ABC that Wilkerson "has made a cottage industry of out of fantasies about the vice president," and pointed out that al-Libi was not among the three al Qaeda figures the United States has admitted to subjecting to waterboarding.
And she said the former vice president - who has been publicly defending the interrogation program in recent weeks - "would not substitute his own judgment for the professionals at the CIA."
"I think that it's important for us to have all the facts out - and the first and more important fact is that the vice president has been absolutely clear that he supported this program, this was an important program," she said. "It saved American lives."
According to a 2006 report by the Senate Intelligence Committee, al-Libi reported he told Egyptian agents about the alleged al Qaeda-Iraq link after being beaten and confined to a roughly 20-inch-by-20-inch box for 17 hours. Egypt has denied al-Libi's allegations.
Al-Libi recanted the claim in 2004, and no other evidence to support his allegation was found after the invasion of Iraq, the Intelligence Committee concluded. He died in a prison in Libya in early May, reportedly a suicide, according to New York-based Human Rights Watch.
The Washington Post, citing unnamed senior intelligence officials, reported Saturday that two top al Qaeda figures who were subjected to waterboarding - Khalid Sheikh Mohammed and Abu Zubaydah - were not asked about al Qaeda and Iraq while being subjected to the practice, though they had been questioned about possible connections between the two during other sessions.
Wilkerson told CNN he could not prove his allegations in court, "but I'm pretty sure it's fairly accurate." And an Army psychiatrist, Maj. Paul Burney, also told the Pentagon's inspector-general that interrogators at the Guantanamo Bay prison camp were pressed to question al Qaeda captives about any connections to Iraq, though other witnesses cited in an April report by the Senate Armed Services Committee did not recall similar pressure.
Dick Cheney criticized Powell during a television interview last weekend, saying he no longer considers Powell a fellow Republican after his former colleague endorsed Democratic candidate Barack Obama in the 2008 presidential election. But Wilkerson said he is not speaking for his former boss and does not know whether Powell shares his views.