Liberty Reprimed Liberty Reprimed is a Brotherhood of Steel main quest in " Fallout 4 " . Detailed walkthrough . After the successful completion of both From Within and Outside the Wire , the Sole Survivor will be told by Elder Maxson to speak to Ingram at Boston Airport to work on a secret project . Meet Ingram at the airport and she will lead them to a sealed area of the depot where the remains of Liberty Prime , the Brotherhood war machine that was destroyed by the Enclave ten years ago , are stored . She mentions the difficulty the Brotherhood has had getting it back on to its feet , and that they need the help of a scientist skilled in power systems . The next step depends on the player ' s choices while they were in the Institute . Construct electromagnetic actuators . Once the Sole Survivor returns to the airport , Li / Scara will tell them that , in order to fix Prime ' s arms and legs , they will need to make four electromagnetic actuator s . They will then be given the electromagnetic actuators list , which lists the components required for each one . In total , they will require : Fortunately , the Sole Survivor is only required to find a single high - powered magnet , as the remaining items will automatically be deposited into the workshop . The magnets are a relatively rare item , but may be found in a few areas or bought from certain traders . The quest log will point towards a building containing one , usually Milton General Hospital or Medford Memorial Hospital , but visiting this location is not necessary , assuming the magnet can be found elsewhere . Once all the required materials have been found , go to the airport workbench and craft the four actuators by placing them on the ground . Return to Ingram once the actuators are ready . Find the nukes for Liberty Prime . Ingram will tell the Sole Survivor that Prime is still missing one of its key components : nukes to use in combat . She will inform them that Proctor Quinlan found information about a pre - War bomb storage facility located somewhere within the Glowing Sea , which holds a storage of suitable Mark 28 nukes . Make preparations for the next assignment , then head for the northern part of the Glowing Sea , at Waypoint Echo , where one will meet Scribe Haylen . She will give the player character a distress pulser to use once they have found the nukes . Head for the southeastern Glowing Sea where the Sentinel site can be found , which holds the nukes . The area is inhabited by a large population of feral ghouls , so be prepared to fight . To access the main area , one will need to use the Sentinel site blast door override holotape or use one of the terminals to cancel the launch order and access the facility . Head for the tunnels , where one will meet a large number of ghouls . At the end of the tunnel , one will see the blast door to the stockpile area . The door one can enter from is on the left , next to the broken terminal . This area is guarded by Brother Henri of the Church of the Children of Atom , who will ask the Sole Survivor the reason for their presence , stating that the area is " Atom ' s hallowed ground . " One will need to pass a medium - difficulty Speech check to convince him to give the player character the password to the computer that unlocks access to the nukes . If the " Far Harbor " add - on is installed and the player character has joined the Children of Atom , they can pass an easy speech check saying they are a Child of Atom from the church in the north . Otherwise , the player character will have to eliminate him . Henri himself isn ' t that much of a threat , but he is accompanied by an assaultron named Atom ' s Wrath that will attack the player character along with Henri . Loot the password from Henri ' s body , then use the terminal to unlock the storage area , where the player character will need to use the pulser . If Danse is the current companion , he will tell the player character that he will stay behind to ensure the nukes reach the airport safely . If Danse is not the current companion , then his affinity drops to zero . Return to Ingram to inform her of the mission ' s success . Activate Liberty Prime . After a short discussion with Ingram and Scara / Li , the player character will be allowed to push the button to finally power up Liberty Prime . After doing so , talk with Ingram and the mission completes . Ingram will give the player character a medical pump mod for T - 60 power armor . She will then state that Maxson would like to speak with the player character , which starts the next quest , Blind Betrayal .