From Secrecy News:
This week NASA abruptly took the massive NASA Technical Reports Server (NTRS) offline. Though no explanation for the removal was offered, it appeared to be in response to concerns that export controlled information was contained in the collection.
“Until further notice, the NTRS system will be unavailable for public access. We apologize for any inconvenience this may cause you and anticipate that this site will return to service in the near future,” the NTRS homepage now states.
“NASA should immediately take down all publicly available technical data sources until all documents that have not been subjected to export control review have received such a review and all controlled documents are removed from the system,” Rep. Wolf said.
In other words, all NASA technical documents, no matter how voluminous and valuable they are, should cease to be publicly available in order to prevent the continued disclosure of any restricted documents, no matter how limited or insignificant they may be.
Read the Complete Report
Update (March 23, 2012): Database Is Shut Down by NASA for a Review (via NY York Times)