Neil deGrasse Tyson: Let's Think Big About Space

What does the future hold for America’s space program? Astrophysicist Neil deGrasse Tyson argues that space exploration is vital for our economy, our security — and our morale. "Audacious visions... have the power to change assumptions about what is possible," he says. In his most recent book, "Space Chronicles," Tyson challenges lawmakers to invest in NASA and once again put a priority on the nation's space program. Neil deGrasse Tyson joins us to talk meteors, aliens and thinking big about exploring the universe.

Also this hour: are black students disciplined more harshly than white students in Seattle schools? The U.S. Department of Education has opened an investigation into the possibility. We get the story from KUOW’s Ann Dornfeld. Our reporting partners at EarthFix bring us another voice in the debate over coal terminals in the Pacific Northwest. Plus, KUOW's Patricia Murphy gets us up to date on an Army-wide review of PTSD diagnoses.