Astra Linux: Russian Linux-based computer operating system

Astra Linux is a Russian Linux-based computer operating system developed to meet the needs of the Russian army, other armed forces and intelligence agencies.It provides data protection up to the level of "top secret" in Russian classified information grade. It has been officially certified by Russian Defense Ministry, Federal Service for Technical and Export Control and Federal Security Service.I downloaded the iso image from https://astralinux.ru/products/astra-linux-special-edition/

Few screen shots during the installation :