January 10
In what is described as the worst industrial disaster in state history, the Pemberton Mill in Lawrence, Mass., collapses, trapping 900 workers, mostly Irish women. More than 100 die, scores more injured in the collapse and ensuing fire. Too much machinery had been crammed into the building - 1860
Wobblie organizer and singer Joe Hill allegedly kills two men during a grocery store hold-up in Utah. He ultimately hangs for the crime despite much speculation that he was framed - 1914

Former AFL-CIO President George Meany dies at age 85. The one-time plumber led the labor federation from the time of the AFL and CIO merger in 1955 until shortly before his death - 1980
And this:

January 10, 1980 - George Meany, president of the AFL-CIO, died at age 85. A native of New York City, Meany followed in his father's footsteps and became a plumber. He was a union man from the start and rose through several labor posts, becoming president of the American Federation of Labor in 1952. He presided over the AFL's merger with the Congress of Industrial Organizations in 1955.
The Supreme Court lets stand implementation of North American Free Trade Agreement (NAFTA) despite the lack of an Environmental Impact Statement - 2004
Labor history found here:
http://www.unionist.com/today-in-labor-history & here:
http://www.workdayminnesota.org/index.php?history_9_01_10_2011