One month after the arrest of Greenpeace activists in Russia, protesters have once again rallied for their release. Demonstrations took place in both Moscow, and the port city of Murmansk, where the 30 activists are being held. So far, 18 of them have been denied bail, ahead of their trial next month on piracy charges. They were arrested in Arctic Waters, after some tried to scale a Russian-owned drilling platform. Al Jazeera's David Chater reports from Moscow.