Something unknown, engineers say, has blocked the progress of the biggest-diameter tunnel-boring machine in use on the planet. Read original article: Under Seattle, a Big Object Blocks Bertha. What Is It? ; ;Related ArticlesOutcry in Eastern Long Island Over a Plan to Cull DeerCanadian Review Panel Approves Plans for an Oil PipelineIn the Shadow of Rising Towers, Laments of Lost Sunlight in New York ;
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