After [a] speech and the release of data by Dr. Hansen on Dec. 15 showing that 2005 was probably the warmest year in at least a century, officials at the headquarters of the space agency repeatedly [warned] Dr. Hansen that there would be dire consequences" if such statements continued. Hansen, longtime director of the agency's Goddard Institute for Space Studies, said in an interview that officials at NASA headquarters had ordered the public affairs staff to review his coming lectures, papers, postings on the Goddard Web site and requests for interviews from journalists. Dean Acosta, deputy assistant administrator for public affairs at the space agency, said...the restrictions on Dr. Hansen applied to all [NASA] personnel. "This is not about any individual or any issue like global warming," he said. Dr. Hansen strongly disagreed...saying such procedures had already prevented the public from fully grasping recent findings. Dr. Hansen said that nothing in 30 years equaled the push made since early December to keep him from publicly discussing what he says are clear-cut dangers from further delay in curbing carbon dioxide. The fight between Dr. Hansen and administration officials echoes other recent disputes. At climate laboratories of the National Oceanic and Atmospheric Administration, for example, many scientists who routinely took calls from reporters five years ago can now do so only if the interview is approved by administration officials in Washington, and then only if a public affairs officer is present or on the phone.

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