Comment: Note the bastardization of the term "raid." They've "infiltrated the databases." Probably by exploiting the Interwebs through a Darkweb on Tor which is a 0 day bitcoin.
In addition to taking information on the Iron Dome, the attackers were also able to nab plans regarding other projects - including Unmanned Aerial Vehicles, ballistic rockets, and "detailed schematics and specifications" for the Arrow III missile interceptor.
According to independent journalist Brian Krebs, the intrusion occurred between 2011 and 2012 and was carried out by China's infamous "Comment Crew" - a group of cyber warriors linked to the Chinese People's Liberation Army (PLA).
Comment: Yes, yes. The infamous Comment Crew, truly deadly and terrifying. We've all heard about them right? Puhlease.
In May, the United States charged five members of this group with cyber espionage against American computer networks. The hackers reportedly infiltrated US systems in order to "steal information that would provide an economic advantage" for Chinese companies, including "Chinese state-owned enterprises."