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Dr. Julian Nicholas told an audience of imaging specialists that he and other FDA staffers “were pressured to change their scientific opinion,” by managers in the agency’s medical device division.

Nicholas, now a physician at the Scripps Clinic in San Diego, said he and eight other staffers raised their concerns with the division’s top director Dr. Jeffrey Shuren last September.

“Scientific and regulatory review process for medical devices was being distorted by managers who were not following the laws,” Nicholas said. A month later Nicholas’ position was “terminated,” he said.

The allegations about suppression of scientific dissent within FDA are not the first, and come at an inopportune time for the agency.

Tuesday’s meeting was designed to kick off FDA’s campaign to reduce radiation exposure from medical scanning. The agency is seeking input from physicians and manufacturers on additional safety controls and training to improve CT scanners and other medical imaging devices.

Hundreds of studies have linked certain types of radiation, including the type used in medical imaging, to cancer that can surface decades later.

FDA medical reviewer Dr. Robert Smith, a colleague of Nicholas who also presented at Tuesday’s public meeting, said he hoped the FDA would learn a lesson from Nicholas’ testimony.

“Science must not be ignored, suppressed or distorted as that endangers the public,” Smith told the audience.

Agency spokesman Dick Thompson said in a statement the FDA’s inspector general looked into Nicholas’ allegations of retaliation against agency scientists and did not pursue further action or investigation. The agency’s policies do not allow staffers to be penalized for expressing scientific views, he added.

“It is not uncommon for scientists, both internal and external to the agency, to disagree on the safety and effectiveness of products under review or on the steps needed to achieve public health goals,” said the FDA statement.

Nicholas, an Oxford University-trained intestinal specialist, raised specific concerns about the safety and effectiveness of CT screening for colon cancer.

CT scans provide detailed, three-dimensional images of the body, but at a cost: one CT chest scan carries as much radiation as nearly 400 chest X-rays, according to the FDA.

As a reviewer of medical device applications, Nicholas repeatedly rejected a manufacturers’ request to market a CT scanner specifically for colon cancer screening. Nicholas said he is legally barred from naming the manufacturer or discussing the details of its application.

In a June 2009 letter to senior managers, Nicholas stressed that patients should be warned of the radiation risks of CT scanning.

“I hope you understand that the failure to include a warning on the label will mean that patients will undoubtedly develop abdominal cancer and leukemia,” Nicholas wrote “It may not happen tomorrow, but yes, sadly it will happen.”

Those startling results, published online Monday in the journal Pediatrics, are only an estimate. But several experts who reviewed the analysis said the methods and conclusions seem sound.

“The health care system has got to be aware that breast-feeding makes a profound difference,” said Dr. Ruth Lawrence, who heads the American Academy of Pediatrics’ breast-feeding section.

The findings suggest that there are hundreds of deaths and many more costly illnesses each year from health problems that breast-feeding may help prevent. These include stomach viruses, ear infections, asthma, juvenile diabetes, Sudden Infant Death Syndrome and even childhood leukemia.

The magnitude of health benefits linked to breast-feeding is vastly underappreciated, said lead author Dr. Melissa Bartick, an internist and instructor at Harvard Medical School. Breast-feeding is sometimes considered a lifestyle choice, but Bartick calls it a public health issue.

Among the benefits: Breast milk contains antibodies that help babies fight infections; it also can affect insulin levels in the blood, which may make breast-fed babies less likely to develop diabetes and obesity.

The analysis studied the prevalence of 10 common childhood illnesses, costs of treating those diseases, including hospitalization, and the level of disease protection other studies have linked with breast-feeding.

Volcker, answering a question from the audience at a New York Historical Society event, said the value-added tax “was not as toxic an idea” as it has been in the past and also said a carbon or other energy-related tax may become necessary.

In his 10 years as facial plastic surgeon, Dr. Steven Dayan has had no shortage of patients in his downtown Chicago office. But these days, Dr. Dayan says more and more are looking for an edge in the challenging job market.

The memo, signed Dec. 19, 1974, was issued just one month before the Senate established an 11-member panel, known as the Church Committee, to investigate government surveillance programs. The Church Committee would ultimately uncover other unconstitutional spying activities, such as that conducted by the National Security Agency under the rubric of Operation Shamrock. Two days after the memo was signed, investigative reporter Seymour Hersh, writing in The New York Times, disclosed a covert government spying program that focused on monitoring political activists in the U.S.

Ford became president after Richard Nixon’s resignation in the wake of the Watergate spying scandal, and he later supported passage of the pro-privacy Foreign Intelligence Surveillance Act of 1978, which placed restrictions on wiretapping and required law enforcement to obtain permission from a special court to conduct domestic intelligence surveillance.

But according to the recently released top-secret memo, just two years earlier, Ford had secretly authorized Attorney General William B. Saxbe “to approve, without prior judicial warrants, specific electronic surveillance within the United States which may be requested by the Director of the Federal Bureau of Investigation.”

Ford wrote in the memo to Saxbe that he had “been advised by you [Saxbe] and by the Department of State that such surveillance is consistent with the Constitution, laws and treaties of the United States.”

“This could be Bush after 9/11 or Obama after becoming president, but it’s President Ford 35 years ago, coping with Cold War struggles,” John Laprise, a visiting assistant professor at Northwestern University, told the center. “It’s really a stunning document that raises all sorts of questions.”

Ford’s order authorized surveillance for foreign intelligence and counterintelligence purposes, and would have involved spying on Americans or foreigners in the U. S. who were suspected of spying for foreign countries or foreign-based political groups. The open-ended surveillance authority could only be revoked by Ford or by order of a future president.

It’s not known to what extent the surveillance might have involved U.S. citizens or whether there was a specific incident or investigation that prompted the memo. In the memo, Ford writes that he “carefully reviewed the issues raised in your request for confirmation of authority and delegation with respect to warrantless electronic surveillance within the United States.”

The surveillance had to be in service of several objectives — to protect the United States against attacks by a foreign power, to obtain foreign intelligence that was deemed to be essential to national security, or to obtain information that the secretary of state or the national security adviser deemed necessary to foreign affairs.

Ford wrote that the warrantless surveillance would only be authorized with the personal approval of the attorney general “upon submission of a written request by the director of the Federal Bureau of Investigation providing complete justification for the conduct of such surveillance, including identification of the agency and presidential appointee initiating the request” and that only “the minimum physical intrusion necessary to obtain the information sought will be used.”

The National Archives obtained the memo, which it shared with the Center for Investigative Reporting, based in California. A previous, slightly redacted version of the memo was released in 2006.

Sources tell CBS News that the criminal case against Cassano – once called “the Man who Crashed the World” – has “hit a brick wall” – meaning that it is likely no one will be held criminally liable for the downfall of the company that triggered a $182 billion dollar federal bailout.

Sources tell CBS News federal investigators have been unable to uncover any evidence that Cassano lied to his bosses or shareholders about financial problems at AIG.