THE HAGUE (Reuters) - Environmental activists chanting "keep it in the ground" blocked the entrance to Shell's headquarters in The Hague on Friday, protesting at the energy company's role in climate change, until police dragged them away, detaining 30.Some of the environmentalists from the Extinction Rebellion and Shell Must Fall! lobby groups wedged themselves between the glass front doors of the building. Others held banners and splashed a black liquid on its front steps, chanting slogans..