While we mostly focus on US government attempts to hide secrets from the people, similar stories are obviously happening around the globe. Over in the UK, there's an ongoing legal fight over whether or not intelligence agencies MI5 and MI6 can simply hide all evidence gathered abroad in cases
that relate to that evidence. Apparently, a lower court had rejected this idea, but the intelligence agencies are appealing, and claiming that the general principle that a "litigant must see and hear the evidence used against him or her," should not apply to cases where these intelligence agencies collect information abroad. If that seems a bit scary, well, then you're paying attention. It's really quite troubling how much various governments have worked hard to avoid any form of oversight, and open up more and more avenues under which they can abuse the law with little or no repercussions.