World leaders weigh in after US President Joe Biden announced that he's ending his bid for re-election and put his support behind Vice President Kamala Harris as the Democratic nominee. Also, a project in Namibia hopes to combine a pesky plant known as the encroacher bush with a mushroom byproduct known as mycelium to help deal with the country's housing crisis. And, Kenya sends its first fencer, Alexandra Ndolo, to the Olympic Games. Plus, BALTHVS brings back the short-lived psychedelic music era in Colombia.

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