Miriam Friedrich (23) of Austria, Zoe Buckley Lennox (21) of Australia, Aliyah Field (27) of the USA and Andreas Widlund (27) of Sweden (L-R) during climb training on board the Greenpeace ship Esperanza.

Six people from around the world are tailing Shell's Arctic oil rig on board the Greenpeace ship Esperanza. As ambassadors of a movement of millions, the six men and women want to expose Shell's reckless plans to drill in the remote Chukchi Sea in the Alaskan Arctic this summer. Esperanza is following Shell's oil rig the Polar Pioneer in transit across the Pacific on board the heavy lift vessel Blue Marlin.