Friends of the earth and friends of the earth germany planning (BUND) on the 24/4/2010 a 120km long human chain of anti nuclear protesters between the 2 nuclear powerstations of Krümmel und Brunsbüttel, which will also cross the whole city of Hamburg.
read more on the BUND website:
 http://www.bund.net/bundnet/themen_und_projekte/atomkraft/aktiv_werden/kettenreaktion/