Martin Prieto, Executive Director of Greenpeace Argentina addresses the crowd at a rock concert, organised in support of the Arctic 30 in Buenos Aires.

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.