President Mokgweetsi Masisi gave Botswana the afternoon off on Friday to celebrate Letsile Tebogo, the country’s first Olympic gold medalist and the first African to be crowned 200-meter champion at a Summer Games. Masisi hailed the 21-year-old sprinter as “Botswana’s Sensation” after his outstanding performance on Thursday in the Paris Olympics. “Botswana’s finest sporting moment,”