From the report:

Our investigation found that during the fall of 2004 through early 2006, the NASA Headquarters Office of Public Affairs managed the topic of climate change in a manner that reduced, marginalized, or mischaracterized climate change science made available to the general public through those particular media over which the Office of Public Affairs had control (i.e., news releases and media access).

We also concluded that the climate change editorial decisions were localized within the NASA Headquarters Office of Public Affairs; we found no credible evidence suggesting that senior NASA or Administration officials directed the NASA Headquarters Office of Public Affairs to minimize information relating to climate change.

To the contrary, we found that once NASA leadership within the Office of the Administrator were made aware of the scope of the conflict between the Office of Public Affairs and scientists working on climate change, they aggressively implemented new policies with a view toward improved processes in editorial decision-making relating to scientific public affairs matters.

...With respect to NASA’s climate change research activities, we found no evidence indicating that NASA blocked or interfered with the actual research activities of its climate change scientists.

In contrast to our findings associated with the NASA Headquarters Office of Public Affairs, we found that NASA systematically distributed its technical climate change research throughout the scientific community and otherwise made it available through a variety of specialized forums, such as scientific journals, professional conferences, and public appearances by NASA scientists.

Further, our recent audit of NASA’s formal process for releasing scientific and technical data resulting from research conducted by its employees and contractors found no evidence that the process was used as a means to inappropriately suppress the release of scientific or technical data at the four NASA Field Centers reviewed. Of the 287 authors surveyed at those Field Centers, none indicated that they had experienced or knew of someone who had experienced actual or perceived suppression of their research by NASA management. In short, the defects we found are associated with the manner of operation of the NASA Headquarters Office of Public Affairs and are largely due to the actions of a few key senior employees of that office.