Robin Young and Jeremy Hobson host Here & Now, a live two-hour production of NPR and WBUR Boston.
The lion's death wasn't the only shocking poaching incident this week, as five elephants were slaughtered in Kenya.
The film, called "The End Of The Tour," is based on David Lipsky's five-day road trip with the late author in 1996.
The experimental vaccine was tested in Guinea. World Health Organization officials are hopeful it works to stop the deadly virus.
The march, which will travel from Selma, Ala. to Washington, seeks to highlight vulnerable communities subject to regressive voting rights.