April 30

An explosion at the Everettville mine in Everettville, W. Va., kills 109 miners, many of whom lie in unmarked graves to this day - 1927
 
The Obama administration’s National Labor Relations Board implements new rules to speed up unionization elections. The new rules are largely seen as a counter to employer manipulation of the law to prevent workers from unionizing - 2012

More info & ammo for unionists is available
online from Union Communication Services.

http://www.unionist.com/