Fireworks

Independence Day Part 1 premiered on Cartoon Network as a special one hour, two episode long event of the series Young Justice.

Synopsis
Robin, Speedy, Aqualad and Kid Flash are finally granted access to the headquarters of the Justice League. But when that access turns out to be little more than a glorified backstage pass, Speedy walks, and the other three sidekicks go on a mission of their own…to Project Cadmus, where they make a startling discovery…