The US Navy tested a
new variant of the tomahawk cruise missile, used as an anti-ship missile as a stop-gap until the
LRASM (Long Range Anti-Ship Missile) comes into service. This variant of the tomahawk isn't exactly new, it was put in service in the 1980s but quickly retired because the 1000nm range was too far for the ships sensors and the flight time also meant it would arrive hours later. The reason it is being brought back to service now is because modern data-links allow the missile to be guided in by closer assets (Satellites, Tactical Aircraft (Like the F/A-18E/F shown in video), other ships, etc). Another reason is because as of right now, the US Navy operated the 1970 era Harpoon anti-ship missile which is close to useless against a modern navy, it has poor range, speed, and cannot do any maneuvering to avoid being hit by something like a CIWS.
ANYWAY, the only reason I bring this up is because I wanted to share the awesome video of the test. Also, the missile didn't have a warhead.
(Click Image For Video)

tl;dr US Navy tests new anti-ship missile and the video of the test is pretty cool.