GDI mission 3: Capture Train Station GDI mission 5: Defend Crash Site Tiberian Sun GDI missions: -----------------------------------------------------------------------------------br Video walkthrough for mission 4 of the GDI campaign in Command & Conquer Tiberian Sun. The previous optional mission 3 was completed. Played on hard difficulty with no commentary.br br Objectives:br 1. Locate the crash site.br 2. Capture any Nod technology centers.