message: Stealth Destroyer and Stealth Bomber require Superconductors
diff: <bUnitAI>1</bUnitAI>
  </UnitAI>
  </UnitAIs>
  - <PrereqTech>TECH_SUPERMATERIALS</PrereqTech>
  + <PrereqTech>TECH_SUPERCONDUCTORS</PrereqTech>
  <PrereqBonuses>
  <BonusType>BONUS_OIL</BonusType>
  <BonusType>BONUS_URANIUM</BonusType>
  <bUnitAI>1</bUnitAI>
  </UnitAI>
  </UnitAIs>
  - <PrereqTech>TECH_SUPERMATERIALS</PrereqTech>
  + <PrereqTech>TECH_SUPERCONDUCTORS</PrereqTech>
  <BonusType>BONUS_OIL</BonusType>
  <PrereqBonuses>
  <BonusType>BONUS_ALUMINUM</BonusType>
  