An employee of German car manufacturer Opel holds up a t-shirt reading 'We are Opel' punctured with a cardboard knife symbolizing GM, during a warning strike at the Opel plant in Kaiserslautern November 5, 2009. The board of General Motors Co has opted to keep Opel, undoing months of painstaking negotiations to sell the European unit to a Russian-backed group led by Canada's Magna. GM confirmed the decision made by its 13-member board after a meeting of directors on Tuesday in Detroit (XINHUA)