Their parents or grandparents 80 years ago stood together and fought in the streets of Minneapolis for the right to organize a union during 1934's Teamster strikes.
The strike brought all trucking inside the city to a standstill; two strikers died from the police shotgun blasts and 65-67 more were wounded.
On this day in 1963, in East St. Louis, Illinois, 200 people - 170 of them female, and majority African-American - engaged in a sit-in protest.
It happened on August 12, 1919. The chorus girls in his Ziegfeld Follies formed their own union, the Chorus Equity Association.
It has been a cornerstone of the civil rights movement, by ensuring that every American citizen, regardless of race or language, has equal access to the vote.