How did the atom bombs of the Manhattan Project become the nuclear stockpile of today? At the heart of America’s nuclear security enterprise lies a town: Los Alamos. It is where the first nuclear bomb was created. Today its national lab is tasked with designing and building America’s first new warhead in decades.

This four-part series traces the scientific story of nuclear weapons. We go behind the scenes at America's nuclear-weapons laboratories to find out how the country is pushing the frontiers of extreme physics, materials science and computing to modernise its stockpile.

In episode two, we look at the town that built the first nuclear bomb—and how the race to build better, more powerful nuclear weapons ended up building the town.

Host: Alok Jha, The Economist’s science and technology editor. Contributors: Kristen Hollis and Todd Nickols of the Los Alamos Historical Society; Nic Lewis and Thom Mason of the Los Alamos National Laboratory; Ellen Bradbury Reid and Jim Bradbury, who grew up in Los Alamos.

Listen to episode three here.

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