Percent of People Employed

From a post of John Stossel "President Obama touts, "The lowest unemployment rate in over five years," but it's only because many gave up work. The percent of people employed is flat"

I tried to find another source for this.  I found this.

There must be a total people who are employable statistic somewhere.  That should be able to get you the Stossel graph.

From the Bureau of Labor Statistics

Labor Force Statistics from the Current Population Survey
Series Id:           LNS11300000
Seasonally Adjusted
Series title:        (Seas) Labor Force Participation Rate
Labor force status:  Civilian labor force participation rate
Type of data:        Percent or rate
Age:                 16 years and over

Late Comedian Red Skelton Explains the Pledge of Allegiance

Earth From Space

PBS Nova: Earth From Space

What Martin Luther King actually did

The short answer is "Dr. King ended the terror of living in the south"

From "Most of you have no idea what Martin Luther King actually did" HamdenRice, Aug 29, 2011.