With economic inequality at an all-time high, some U.S. presidential candidates are proposing dramatic shifts to the U.S. tax code. How have similar plans worked elsewhere in the world?

President Trump has made reducing the U.S. trade deficit a priority, blaming trade deals like NAFTA, but economists disagree over how policymakers should respond.

Demand has skyrocketed for cobalt, focusing attention on its complex and controversial supply chain. The mineral is an important component in lithium-ion batteries, which power everything from electric cars to smartphones.

China is believed to spend billions of dollars to boost its international image, but it has yet to see a marked return on its investment in soft power.