The Zika virus is spreading to North America, and U.S. delays in approving research and funding could lead to a public health disaster, write Larry Brilliant and CFR’s Laurie Garrett.

Local elections in South Africa will provide a barometer for public concerns over a stubborn problem: how to reduce stark inequalities between whites and blacks, writes CFR’s John Campbell.

At its Warsaw summit, NATO should try to find better solutions to the problem of burden-sharing and a more sustainable strategy for managing tensions with Russia, writes CFR’s Stephen Sestanovich.