The US celebrates Labor Day because of a bloody clash over 100 years ago that left 30 people dead and cost $80 million in damages Posted on September 2, 2017 by depatridge Source: The US celebrates Labor Day because of a bloody clash over 100 years ago that left 30 people dead and cost $80 million in damages Share this:TwitterFacebookLinkedInPinterestWhatsAppPrintTumblrEmailMoreRedditLike this:Like Loading...