In a groundbreaking proposal, the special envoy from Russia proposed the construction of a transcontinental tunnel connecting Russia and the United States. The suggestion, which would necessitate significant political agreement and scientific collaboration, could forge a new path in transportation and economic relations between the two superpowers. The planning and execution details have not yet been revealed.

Japan has historical ties with both the United States and Russia, thus the proposition of a rail tunnel has sparked interest in the land of the rising sun. Given Japan's own engineering accomplishments, such as the Seikan Tunnel and Tokyo Bay Aqua-Line, there's a keen interest in how the project will materialize. Additionally, the development could potentially affect economic and political relations in the Asia-Pacific region.

Large scale infrastructure projects in the US and EU usually involve significant public scrutiny, rigorous environmental and feasibility studies, and lengthy decision-making processes. An endeavor of this magnitude may also be a subject of geopolitical tension and discussions in NATO, given its strategic implications.