U.S. Secretary of State Mike Pompeo has granted a sanctions waiver for the Indian-Iranian port project at Chabahar. The joint venture would otherwise be prohibited by the American ban on transactions with Iran's shipping industry, and the exemption ends an extended period of uncertainty over the port's future. Chabahar's enhanced seaport will boost Indian trade volumes to and from Central Asia, but it will also serve American interests. It will facilitate the delivery of international aid and other goods for Afghanistan's U.S.-backed government,...