In December of 2015, the Falcon 9 landed for the first time at Cape Canaveral Air Force Station. After landing, a static fire test was conducted on the rocket, with a good overall outcome. After demonstrating proof-of-concept, SpaceX furthered the innovation by evaluating what could be done to make the rocket launches more efficient. After the rocket is detached from the payload, some fuel must be used to redirect the rocket to the launch pad. By using an autonomous drone ship, the rocket will only have to use energy to slow the vertical descent, rather than side to side motion. This increases fuel efficiency, decreasing cost.