World's Longest Tunnel Planned

"A 6,000-kilometer (3,700-mile) transport corridor from Siberia into the U.S. will feed into the tunnel, which at 64 miles will be more than twice as long as the underwater section of the Channel Tunnel between the U.K. and France, according to the plan. The tunnel would run in three sections to link the two islands in the Bering Strait between Russia and the U.S...The planned undersea tunnel would contain a high-speed railway, highway and pipelines, as well as power and fiber-optic cables."