The July 30, 1975, disappearance of labor leader Jimmy Hoffa sparked public fascination because he was an important cog in the nation's economy.
May Day has traditionally focused on labor and working class issues. Immigration and immigrant labor adds a new dimension to the holiday.
In the early twentieth-century, some aristocratic college men were eager to prove their masculinity by working as strikebreakers.
Labor unions nationwide may be weakened by the Supreme Court. But unions have been instrumental in protecting the interests of underrepresented groups.