The distinguished group receiving a Presidential Medal of Freedom includes actress Meryl Streep, Ethel Kennedy, widow of the late Sen. Robert Kennedy, singer-songwriter Stevie Wonder and Rep. John Dingell, a Michigan Democrat and the longest-serving member of Congress. Posthumous medals will go to six individuals, among them civil rights workers James Chaney, Andrew Goodman and Michael Schwerner, who were slain in 1964 as they participated in a historic voter registration drive in Mississippi.