Six miners striking for better working conditions under the IWW banner were killed and many wounded in the Columbine Massacre at Lafayette, Colo. Out of this struggle Colorado coal miners gained lasting union contracts - 1927

A county judge in Punxutawney, Pa. grants an injunction requested by the Clearfield Bituminous Coal Co. forbidding strikers from speaking to strikebreakers, posting signs declaring a strike is in progress, or even singing hymns. Union leaders termed the injunction “drastic.” - 1927

The Holland Tunnel opens, running under the Hudson River for 1.6 miles and connecting the island of Manhattan in New York City with Jersey City, NJ. Thirteen workers died over its seven-year-long construction - 1927