Open Sky was an Akritirian brigade that hoped to supplant the Akritirian government and establish a "legitimate government" for their people. They were considered a terrorist group by the Akritirian government, but saw themselves as patriots.
Around 2373, members of Open Sky managed to locate the Akritirian maximum security detention facility, where they believed members of their group were imprisoned. They were also responsible for the Laktivia recreational facility bombing on Akritiri, killing 47 off-duty patrollers. Two members synthesized paralithium into a trilithium explosive aboard their cargo vessel to accomplish this. The USS Voyager, which was powered by dilithium, was subsequently blamed for the explosion because there was no natural source of trilithium in the sector. (VOY: "The Chute")