As part of Morning Edition's 20th anniversary celebration Howard Berkes continue his report in the second of a two part series on Mt. St. Helens. Berkes revisits Mount St. Helens and details the impact that the 1980 eruption had on the volcano's natural surroundings. Plant and animal species have since repopulated the area, but not yet as dense and diverse as before the eruption. That makes Mount St. Helens extremely interesting for scientists studying the resilience of life.