The world's largest natural gas company, Russia's Gazprom, has after years of attempts finally gotten a foothold in the U.S., the world's biggest gas market. A supply agreement, part of a multipart contract reached with Royal Dutch Shell, was announced late Wednesday. The contract, signed in Moscow by Gazprom CEO Alexei Miller and his Shell counterpart Jeroen Van der Veer, guarantees the two companies will deliver 1 million tons of Russian liquefied natural gas annually until 2028. Under the arrangement, Gazprom gets access to a Shell terminal in Baja California, Mexico, that will turn Russian liquefied gas into gas that...