One given of military competition is that the other guy always gets better. The US Navy, which is already wary of China’s “carrier killer” missiles in the South China Sea, may have another worry. South Korean newspaper Joong Ang Daily reports that North Korea may be developing anti-ship ballistic missiles. The projectiles capable of hitting offshore moving targets – like the Japan-based super carrier USS Ronald Reagan – were reportedly tested during North Korea’s most recent missile test on March 6.