A massive forest fire has been raging in Alberta, Canada, for nearly a month. Scientists say warmer, drier weather has increased the frequency and intensity of fires. For this month's Environmental Outlook: wildfires, climate change and threats to North America’s forests.
ABC News’ Nightline producer Richard Harris suffered a stroke two years ago. As he has since learned, 160,000 Americans die from stroke every year, making it the third leading killer in the U.S. Harris joins Nightline host Ted Koppel and Dr. Eric Aldrich of Johns Hopkins University to talk with Diane about an upcoming Nightline segment on stroke.
- Ted Koppel managing editor, Discovery Channel and senior news analyst, NPR
- Dr. Eric Aldrich Johns Hopkins University
- Richard Harris senior producer of ABC News' Nightline
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