Summary: I. "The other man's job. 'Bombs' from sea water." Scenes of the quarrying and processing of limestone and its subsequent mixture with sea water to form magnesium, which is used in incendiary bombs and other weapons of war. Aerial film shows the large fires caused by incendiaries during a bomb raid.
II. "The victory you made possible." The success of the 8th Army assault on Tripoli is attributed to the mechanised forces and mass of materials which it employed and which were produced by the workers on the home front. Entry of troops and tanks into Tripoli marks the "beginning of political freedom" as the Mayor and Prefect of Tripolitania and Vice-Governor of Libya formally surrender to Montgomery. Importance of Allied air superiority is illustrated by damaged ships in the harbour bombed by the RAF. Churchill later arrives at Castel Benito airfield, where he is met by Montgomery and Alexander, before addressing the troops (no sound) and taking the salute at a marchpast in Tripoli.
