A natural gas pipeline being built under the Baltic Sea from Russia to the German coast is shaking up geopolitics. Nord Stream 2, as it’s called, fuels worries in the U.S. and other countries that the link could give the Kremlin new leverage over Germany and other NATO allies. Pipe construction, halted in 2019, resumed in December 2020, yet U.S. sanctions still threaten to pull the brakes on the project backed by the Russia’s Gazprom PJSC.