Presidents Biden and Yoon pledged to deepen and broaden the scope of the U.S.-South Korea alliance, but their success could depend on how China, Japan, and North Korea respond.

Plans to cut greenhouse gas emissions and reach carbon neutrality, to be announced during the 2019 summit, could be an important milestone in the global fight against climate change.

President-Elect Yoon Suk-yeol has pledged to strengthen ties with the United States and take a more hard-line approach toward China and North Korea than his predecessor.

To speed up the colossal effort to vaccinate the world’s population against COVID-19, should drugmakers surrender some of their intellectual property rights?

North Korea will likely continue to develop its nuclear program, but Kim Jong-un could return to negotiations if the United States makes concessions.