Bertha, the largest boring machine in North America, has reached the light at the end of the tunnel after getting stuck underneath the city for two years
2017-12-12 1
Bertha, the largest boring machine in North America, has reached the light at the end of the tunnel after getting stuck underneath the city for two years. Read more about the 7,982-ton behemoth here: trib.al/CVPSmj7
