People attend a "Skills calisthenics" training session at the calisthenics gym created by British anti knife crime charity Steel Warriors by melting the knife blades handed over by the Metropolitan Police, at Ruskin Park, in London, on March 23, 2024. "Our gyms stand as a powerful metaphor... that a negative can be turned into a positive," said Ben Wintour, as he looked at his outdoor London gym made from seized knives. The gym at a park near Brixton, south London, is one of four in the British capital constructed by the "Steel Warriors" charity, which Wintour and co-founder Pia Fontes established in 2017 to help young people avoid knife crime. (Photo by HENRY NICHOLLS / AFP)