for a nuclear phase-out within ten years. Länder governments, municipalities, parties and trade unions explored the question of "whether the use of nuclear power technology was reasonable and sensible for the future". In May 1986 clashes between anti-nuclear protesters and West German police became common. More than 400 people were injured in mid-May at the site of a nuclear-waste reprocessing plant being built near Wackersdorf. Police "used water cannons and dropped tear-gas grenades from helicopters to subdue protesters armed with slingshots, crowbars and Molotov cocktails". More recent developments Several advanced reactor designs in Germany were unsuccessful. Two fast breeder reactors were built, but both were closed in 1991 without the larger ever having achieved criticality. The High Temperature Reactor THTR-300 at Hamm-Uentrop, under construction since 1970, was started in 1983, but was shut down in September 1989. The anti-nuclear protests were also a driving force of the green movement in Germany, from which the party The Greens evolved. When they first came to power in the Schröder administration of 1998 they achieved their major political goal for which they had fought for 20 years: abandoning nuclear energy in Germany. From the mid-1990s onwards, anti-nuclear protests were primarily directed against transports of radioactive waste called "castor" containers. In 1996 there were sit-ins against the second castor consignment bringing nuclear waste from La Hague in France to Gorleben. In 1997 the third castor transport reached Gorleben despite the efforts of several thousand protesters. In 2002, the "Act on the structured phase-out of the utilization of nuclear energy for the commercial generation of electricity" took effect, following a drawn-out political debate and lengthy negotiations with nuclear power plant operators. The act legislated for the shut-down of all German nuclear plants by 2021. The Stade Nuclear Power Plant was the first one to go offline in November 2003, followed by the Obrigheim Nuclear Power Plant in 2005. Block-A of the Biblis Nuclear Power Plant is still provisionally scheduled to be shut down in 2008. Block-B is going back online after a year-long shutdown on 13 or 14 December 2007 and is scheduled to keep operating until 2009 or 2012. In 2007, amid concerns that Russian energy supplies to western Europe may not be reliable, conservative politicians, including Chancellor Angela Merkel and Economics Minister Michael Glos, continued to question the decision to phase out nuclear power in Germany. WISE along with other anti-nuclear movement groups