Greenpeace staff members hold signs to welcome the International Executive Director Kumi Naidoo arriving in Amsterdam after spending 5 days in Nuuk's Institution Prison, for scaling the arctic drilling rig Leiv Eiriksson. Earlier in the week Kumi Naidoo delivered a 50,000 signature petition demanding the public release of Cairn Energy's oil spill response plan. His action comes a week after the operators of the oil platform, Cairn Energy, obtained an injunction against Greenpeace from a Dutch court, imposing fines of 50,000 Euros a day for any breach of the exclusion zone.