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.

Under the command of Xi Jinping, the Chinese Communist Party faces a host of domestic and international challenges as it aims to bolster China’s great-power status.

Responsible for powering the country and its economy, the U.S. energy grid has come under increasing strain due to climate change, and the threat of cyberattacks looms.