Correspondent David Noriega reports from the border between Brazil, Paraguay, and Argentina, a lawless place where criminal gangs are more powerful than nation-states; TikTok is one of the most popular apps -- but it's not exactly the first place someone runs to when they want to find thoughtful, deliberate dialogue. Dexter Thomas examines how that's changing.

Ben Anderson goes to Burkina Faso, where a fast-growing humanitarian crisis spins out of control as the Sahel becomes the new epicenter of terrorism and violence; Michael Moynihan surveys the long-term economic devastation wrought by COVID-19.