Available since yesterday is 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 medianetwork.
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 in the latest Tor Browser 6.0 web browser, all the improvements of icedove an email and news suite.
The new version also contains many other small but useful improvements, such as firewall and kernel hardening, and support for other languages as well except of English. You can see the changelog of the new version from here.
Download it from its official website here.