Richard Wolffe talks about being an eye witness to much of President Obama’s first two years in office. Then B.J. Thomas—of “Raindrops Keep fallin’ on My Head” fame—discusses his 40-year career in music. Also, South African writer Damon Galgut describes his latest novel, In a Strange Room. Plus historian Philip Dray tells about organized labor’s long struggle in America, from the industrial revolution to the present.