Climate activist Greta Thunberg holds her final school strike

Swedish climate activist Greta Thunberg on Friday took part in her final school strike after 251 weeks of demonstrations. "Today, I graduate from school, which means I'll no longer be able to school strike for the climate," the 20-year-old said on Twitter. Thunberg, who was 15 when she began protesting outside Sweden's Parliament in 2018, vowed to continue her activism.