Reuters: Two Greenpeace ships are blocking a dock at Rotterdam port used to unload coal as part of a protest against the construction of a coal-fired power plant there, the environmental group said on Sunday. But a port spokesman called the blockade largely symbolic. Greenpeace activist Agnes de Rooij said the ships Rainbow Warrior and Beluga II were blocking Rotterdam port’s Mississippi dock, where they were expecting a coal ship to dock later on Sunday. “We will try to stay as …