The Defense Department has slammed the door on public access to a Google-like research tool that allows users to quickly navigate the U.S. military’s unclassified and unwieldy annual budget -- now more than $700 billion and spread across scores of volumes, some thousands of pages long -- moving the important resource behind a firewall where it sits with classified research accessible to government employees only. On Oct. 26, the Defense Technical Information Center removed from its public website its DOD...