en.wikipedia.org/wiki/Bertha_(tunnel_boring_machine) Bertha was a 57.5-foot-diameter (17.5 m) tunnel boring machine built specifically for the Washington State Department of Transportation's (WSDOT) Alaskan Way Viaduct replacement tunnel project in Seattle, Washington, United States.[1] It was made by Hitachi Zosen Sakai Works in Osaka, Japan, and the machine's assembly was completed in Seattle in June 2013. Tunnel boring began on July 30, 2013, with the machine scheduled to complete the tunnel in December 2015.
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en.wikipedia.org/wiki/Big_Bertha_(howitzer) The 42 cm kurze Marinekanone 14 L/12[a] (short naval cannon), or Minenwerfer-Gerät (M-Gerät), popularly known by the nickname Big Bertha, was a German siege howitzer built by Krupp AG in Essen, Germany and fielded by the Imperial German Army from 1914 to 1918. The M-Gerät had a 42-centimetre (17 in) calibre barrel, making it one of the largest artillery pieces ever fielded. It was first designed in 1911 and entered production the next year. Test firing began in early 1914, and the gun was estimated to be finished by October. When World War I broke out, the two available M-Gerät guns, still prototypes, were sent to Liège and destroyed Forts Pontisse and Loncin. German soldiers bestowed the gun with the nickname "Big Bertha," which then spread through German newspapers to the Allies, who used it as a nickname for all superheavy German artillery. The Paris Gun, a railway gun used to bomb Paris in 1918, has historically been confused for the M-Gerät.