BERLIN -- German rangers stand guard to visitors away from a nondescript stretch of forest near Berlin, where a sign nearby warns of "Lebensgefahr" (danger to life).
The precautions are part of the frantic activity underway to set up Tesla's latest assembly plant, Elon Musk's most daring attack yet on the German auto establishment.
Workers wielding metal detectors have started combing through an area covering some 200 soccer pitches to search for old wartime ammunition beneath the sandy surface of tiny Gruenheide.
It's the first stage to prepare a site that could build as many as 500,000 cars a year, employ 12,000 people and pose a serious challenge to Volkswagen Group, Daimler and BMW as they all push toward an electric future.
Once deemed free of World War II explosives, trucks will roll in to clear thousands of trees in the first stage of development. All this work needs to be done by the end of February to meet Tesla's aggressive timetable.