A Greenpeace activist shows his support for the Arctic 30 while riding the Rapha Supercross bike race in Sydney Park, dressed as a polar bear.

At events across the world, thousands of people take part in a day of solidarity to mark two months since the Arctic 30 were detained following a peaceful protest against Arctic oil drilling. A Russian court has charged the Arctic 30 (twenty-eight Greenpeace International activists, as well as a freelance videographer and photographer) with both piracy and hooliganism.