The Economist podcast is sponsored by Doctors Without Borders. A legacy gift makes a lasting impact for doctors without borders. Same-sex marriages performed in one state must be recognized by others, and religious institutions cannot be forced to perform them. Some of the world's finest tea comes from dark dealing in India's West Bengal state. But cheaper imports from Nepal just over the border mean the champagne of tea faces an uncertain future. It's a dream that's been a decade away for many decades: nuclear fusion.