Correspondent Alzo Slade heads to Minneapolis and the center of the protest movement against the killing of black Americans by law enforcement; Correspondent Seb Walker travels from Rio de Janeiro to the remote regions of the Amazon to document the impact of COVID-19 and government inaction on some of Brazil's most vulnerable populations; Correspondent Krishna Andavolu meets the “virus hunters” on a mission to prevent the next pandemic. As the world races to find a vaccine for COVID-19, these scientists warn the worst may be yet to come.