Worried about the safety of its scientists, the National Aeronautics and Space Administration plans to pull the plug on two FBI World Wide Web pages on the Unabomber and the Oklahoma City bombing, according to a memo circulated between NASA and FBI officials and obtained by TIME. NASA runs the computer server used by the FBI to post and gather information on the two cases. But effective June 30, the memo says, NASA will withdraw its Internet support. NASA scientists, it adds, have "concerns about their vulnerability" if the space agency continues to sponsor the project. A NASA official involved in the matter refused to comment. Frustrated Justice Department officials are apparently seeking to post the sites elsewhere. TheOklahoma pageincludes an appeal to the public for assistance, and theUnabomber pagetouts the Internet as "another medium that enables us to reach as wide an audience as possible."