After two years of delays, the massive tunnelling machine called Bertha [wikipedia.org] is finally starting" rel="url2html-2916">http://www.seattletimes.com/seattle-news/transportation/bertha-restarts-after-two-years-of-delays/">starting [soylentnews.org] to dig again. Bertha, the world's largest tunnelling machine, broke down after chewing through a pipe. Now Bertha is not just repaired but improved.