The U.S. Navy believes that the long rumored Chinese anti-ship ballistic missile, the DF-21D, is operational. This despite the fact that, as far as anyone knows, or will admit, the complete system has not been tested. There are hints that there were some tests last Summer, and that all the components of the system are present and working. There are photos of DF-21Ds on TELs (transporter erector launcher vehicles), and announcements of new units recently activated for the 2nd Artillery Missile Brigade, equipped with DF-21 missiles. Since all that took place a few months ago, Chinese officials have spoken about not being as concerned about American aircraft carriers. But the key event occurred last August.