To Tails Project just released the third beta of the live OS Tails 3.0, a live operating system that runs on every computer and leaves no traces on either machine but neither in dianetwork.
This particular Tails was used by a former NSA employee Edward Snowden to stay hidden on the internet.
If you want to help with the Tails Project, the first beta for the upcoming 3.0 version has just been released and is available for testing.
What's new;
Tails 3.0 will be the first version of Debian 9 (Stretch) based Tails. So all apps will be upgraded to newer versions.
Other changes:
An 64-bit processor is now required
Redesigning Tails Greeter.
Remove I2P
New X11 guest utilities for VirtualBox
Upgrade and repair the X.Org server
Convert KeePassX databases created with Tails 2.x
Many problems have been fixed by Tails 3.0 ~ beta 2
All the technical details of the changes are listed in Changelog
Download ISO