Original: The Diomede Islands are often mentioned as likely intermediate stops for a bridge or tunnel (Bering Strait bridge) spanning the Bering Strait.
Simplified: There are plans to build a connection between Siberia and Alaska, either as a bridge or a tunnel (Bering Strait bridge spanning the Bering Strait). In that case, the Diomede Island would be a halfway point, as they are about the middle of the Bering Strait.