International efforts, such as the Paris Agreement, aim to reduce greenhouse gas emissions. But experts say countries aren’t doing enough to limit dangerous global warming.

The swift development of effective vaccines against COVID-19 was an unprecedented scientific achievement. But production challenges, vaccine nationalism, and new variants have all presented hurdles.

Kim Jong-un has accelerated North Korea’s buildup of nuclear and other weapons of mass destruction, while also modernizing its large conventional force.

The U.S. health agency regulates the country’s foods and drugs, among other products. The COVID-19 pandemic and controversy over vaccines and treatments have highlighted the FDA’s role.

The United States has long tried to negotiate a resolution to the Israeli-Palestinian conflict, but several factors, including deep divisions between and within the parties and declining U.S. interes…