 Complete the following phrase:  In September 2013, Arctic Sunrise participated in Greenpeace protests against oil drilling activities by the Russian energy company Gazprom at the Prirazlomnaya oil rig in the Pechora Sea. Greenpeace opposes oil drilling in the Arctic on the grounds that oil drilling damages the Arctic ecosystem, and that no safety plans are in place to prevent oil spills. Earlier in August 2012, Greenpeace staged similar protests against the same oil rig. On 18 September, the crew of Arctic Sunrise circled the Prirazlomnaya oil rig, while three crew attempted to board the platform. In response, the Russian Coast Guard seized control of the ship and detained the activists. The ship was later towed by a coast guard vessel to the Russian Arctic port of Murmansk. The Arctic Sunrise crew consisted of 30 members from 16 nationalities. The Russian government intended to charge the Greenpeace activists with piracy, which carries a maximum penalty of fifteen years of imprisonment, although Russian President Vladimir Putin has said the activists are obviously not pirates. Putin distanced himself from the case and indicated that the independent Russian judiciary would continue with the investigation. On 23 October 2013 the Russian prosecution altered the charges against the activists, rescinding the piracy allegation and charging them instead with hooliganism. A conviction of hooliganism in Russia can result in costly fines and up to seven years in prison. According to Phil Radford, Executive Director of Greenpeace in the U.S. at the time, the reaction of the Russian coast guard and courts was the stiffest response that Greenpeace has encountered from a government since the 