As the Cold War wound down, new challenges and changes came for the Seabees starting with the increased incidence of terrorism. This was in addition to ongoing Seabee support missions for USN/USMC bases worldwide. Cold War Facilities still required support, like the Polaris and Poseidon submarines at Holy Loch, Rota. In 1971, the Seabees began the huge project on Diego Garcia in the Indian Ocean. It was completed in 1987 at a cost of $200 million. With the extended construction timeline, it is difficult to inflation-adjust that cost into today's dollars. The complex accommodates the Navy's largest ships and cargo planes. The base served as a staging facility for Operations Desert Shield and Desert Storm. Additionally, Seabees were also tasked upgrading and expanding Naval Air Station Sigonella, Sicily for the United States Sixth Fleet.