In a prime-time address on Wednesday night, President Obama is expected to frame the threat posed by the Islamic State and outline his strategy for "degrading and ultimately destroying the terrorist group." The speech comes as domestic public opinion on intervention has changed markedly in the wake of the beheading of two American journalists.
Audie Cornish talks to geographer David Salisbury about his friend Edwin Chota. Chota — the Peruvian activist who advocated that land that was being illegally logged should be given to indigenous groups — was murdered deep in the Amazon jungle on Sept. 1. The murder was not reported until this week because of the remote location.