Phoenix Logs/Forerunner/Retriever Sentinel


 * Extremely powerful Forerunner drone


 * The Ark's Retriever Sentinels are among the most powerful Forerunner drones,
 * their primary purpose being the mining of the Foundry in the creation of Halos
 * and Ark maintenance. However, like all Forerunner drones, they can also be used
 * to defend the Ark by turning its sentinel lasers on anyone who threatens it.


 * The Retriever Sentinels played an important part in repairing the Ark after the
 * events of 2553 in the final battle between the UNSC and the Covenant. UNSC
 * scientists at the Henry Lamb Research outpost reactivated the dormant
 * retrievers and watched in awe as the Ark was restored to its former glories.
 * Sadly, war has once again come to the Ark, but the Forerunner drones built to
 * protect it will stand fast and push back against any and all invaders.