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.

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.