The Post Office’s first mass work stoppage in 195 years began in Brooklyn and Manhattan and spread to 210,000 of the nation’s 750,000 postal employees. Mail service was virtually paralyzed in several cities, and President Nixon declared a state of emergency. A settlement came after two weeks - 1970

The federal Coal Mine Health and Safety Act is enacted - 1970

United Mine Workers reformer Joseph "Jock" Yablonski, his wife and daughter are murdered by hitmen hired by union president Tony Boyle, who was to be convicted of the crime and eventually die in prison - 1969