On this day in Labor History the year was 1920. At noon, a horse-drawn wagon containing 100 pounds of dynamite pulled up across the street of the J.P. Morgan Chase Company on Wall Street in New York City. 500 pounds of cast-iron slugs were packed in with the dynamite.

On this day in Labor History the year was 1845. 5,000 female workers at the Allegheny Cotton Mills went on strike for a ten-hour day. The fast streams around Pittsburgh and Allegheny city were ideal to power cotton mills. The mills were overheated and filled with dangerous dust.

On this day in Labor History the year was 1959. The United States Congress passed the Landrum-Griffin Act. President Eisenhower signed the new law, which was also called the Labor-Management Reporting and Disclosure Act. The new law had lasting consequences for the way unions operated.

On this day in Labor History the year was 2013. Riot police used tear gas and water cannons to clear out Zocalo Square in Mexico City. The square was occupied by protesting teachers. The teachers had been on strike for weeks. They wanted changes made to education reforms that had been passed by the Mexican government.

On this day in Labor History the year was 1918. Socialist and labor leader Eugene Debs was sentenced to ten years in prison for opposing the United States’ involvement in World War I. The Espionage and Sedition Act had been passed a year earlier.

Today in Labor History, we pause to remember the events that took place on the morning of September 11. The year was 2001.

Terrorists hijacked planes and intentionally crashed them into Twin Towers in New York and the Pentagon in Washington, D.C. Nearly 3,000 people were killed in the attacks.

On this day in Labor History the year was 1897, striking coal miners marched on a coal mine in Lattimer, Pennsylvania. Earlier that year the miners had gone out on strike. Most of the miners were German or Eastern European immigrants.

On this day in Labor History the year was 1924. Sixteen striking Filipino sugar workers on the Hawaiian island of Kauaiwere killed by police. This incident is known as the Hanapepe Massacre. Filipinos began immigrating to Hawaii to work on sugar plantations in 1906.