My son-in-law’s grandmother, known in the family as “Nana,” turned 100 this week. During World War 2, when the Hingham shipyard was desperate for workers, she dared a group of her friends to join her in applying for jobs there. They were all hired, trained as welders, and spent the next three years helping to build more than 200 ships for the North Atlantic fleet. On the occasion of her 100th birthday, ceremonies were held in her honor in a waterfront park, at the site of the former shipyard.