Aaron welcomes Ambassador Linda Thomas-Greenfield to talk about Biden's biggest successes and challenges from 2021 and to look at the year ahead in U.S. foreign policy.

The United States needs a great renewal of its diplomatic capacity, balancing America’s ambitions with the limits of what is possible, and rooting reform in the people who animate U.S. diplomacy.

Africa is changing. Formidable challenges in security and governance remain, with population growth, rapid urbanization, and now the pandemic straining resources and capacity, but the continent is still moving forward at a remarkable pace.