MPR documentary on early days of Minnesota's labor movement 'The Strike is On!' explores the Minnesota labor movement in the first decades of the 20th century, tracing it from the immigrant miners on the Iron Range to flour milling and meatpacking unions to the Minneapolis Truckers' strike in May 1934. Historians say it was a turning point in US labor history. The 1985 documentary was produced by Mark Heistad.12:00 p.m.