Available since yesterday is the live OS Tails 2.4 RC1, a live operating system on CD that runs on every computer and leaves no traces either on the machine or on the Internet.
This particular operating Tails former CIA employee Edward Snowden used to stay hidden on the internet. Since yesterday the Tails 2.4 RC1 version is available for testing by those users who wish and incorporates some important new features and changes, among which we can mention the upgrade to the latest Tor Browser 6.0 web browser, all icedove improvements an email and news suite.
New version it also contains many other small but useful improvements such as firewall and kernel hardening, and support for languages other than English. You can see the changelog of the new version from here.
Download it from its official website here.