Please Explain this week is all about birds: how human activity is driving several species to extinction, and what some people are doing to try and change that. Douglas Kass and Roger Kass, directors of the film Emptying the Skies, discuss the fate of many migrating birds today. Not only is development and construction stressing these populations, but illegal bird poaching in Cyprus and France accounts for millions of bird deaths. The film profiles a group of activists who go to these poaching areas, releasing caught birds and destroying traps. The directors are joined by Tom Auer, Conservation Data Specialist at National Audubon Society.