The international race to develop biological weapons during the 20th century, the challenges scientists faced, and the moral dilemmas posed by their eventual success.
In August 1969, nearly half a million people gathered at a farm in upstate New York to hear music. What happened over the next three days, however, was far more than a concert.
Cinematographer Boyd Estus talks about filming the Pioneer Zephyr exhibit at the Museum of Science and Industry in Chicago and the joys of shooting historical documentaries.
