An unarmed Trident II D5 Life Extension (D5LE) missile launches from Ohio-class ballistic missile submarine USS Alaska (SSBN 732) during a Commander Evaluation Test off the coast of Florida on June 23, 2018. The primary objective of a CET is to validate performance expectations of the Trident II D5LE strategic weapon system on boats that are strategically deployed, and this particular test concluded the D5LE CET population flights for the Ohio-class SSBN. Future tests will be Follow-on Commander Evaluation Tests (FCET) and are required as part of rigorous readiness testing through the remainder of the Ohio-class SSBN service life to ensure the SWS remains fully capable on strategically deployed boats. (U.S. Navy Photo)