Control Node

The Control Node was a massive structure constructed by the Scrin on Earth at Ground Zero that was the key element of their invasion. Its destruction by GDI ended the Third Tiberium War.
The Control Node was constructed on Ground Zero, the place where Tiberium was first discovered on Earth. The Node was completed during the initial stage of the invasion. Its Tiberium-based radiation is essential to the operation of the entire Scrin force.Electronic Arts Los Angeles, Command & Conquer 3: Tiberium Wars. GDI InOps, "Alien Control Node". 
The Control Node proved to be the Scrin's metaphorical Achilles' heel when GDI forces attacked and destroyed the node despite the fierce Scrin and Nod resistance, taking all Scrin assets with it.
==References==
Category:Tiberium Wars campaign-only buildings