Part 1. PBS looks at one of the incidents that gave rise to International Workers Day–May 1 or Mayday.

Haymarket Martyrs–Origins of International Workers Day Pt 2

Part 2. PBS looks at one of the incidents that gave rise to International Workers Day–May 1 or Mayday.

Haymarket Martyrs–Origins of International Workers Day Pt 3

Part 3. PBS looks at one of the incidents that gave rise to International Workers Day–May 1 or Mayday.