If the quest Fire Support has been completed before exiting Fort Hagen during Reunions, this quest will not start.
Head towards Boston Airport and speak to any member of the Brotherhood of Steel, they will direct the Sole Survivor to Paladin Danse at Cambridge Police Station. Upon arriving at Cambridge Police Station the quest will complete.
This quest can be completed by going straight to Cambridge Police Station or just by simply listening to military frequency AF95.
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