From Secrecy News:
Notwithstanding official proclamations of a new era of transparency, public access to declassified historical records continues to be obstructed by procedural potholes, limited resources for processing records, competing priorities and, sometimes, bad faith.
At the Naval History and Heritage Command (NHHC), declassified files that used to be open to the public have been withdrawn indefinitely so that they may reviewed for inadvertent releases of classified nuclear weapons-related information, pursuant to the 1999 “Kyl-Lott” Amendment. Nearly all Navy records there dating from the 1960s forward are now completely unavailable to the public, said historians Larry Berman of UC Davis and William Burr of the National Security Archive.
The blanket closure of entire collections, they suggested in an April 29 letter (pdf), is “wholly inconsistent with the spirit of the new presidential administration.”