I went to visit Mount St. Helens yesterday. Unfortunately, it was raining and we couldn't see the volcano.  We stopped at the Johnston Ridge Observatory (JRO), named for David A. Johnston.  Johnston was a USGS volcanologist who was on duty at the ridge the day Mount St. Helens exploded on May 18, 1980.  "Vancouver! Vancouver! This is It!" was all he could report when the mountain erupted. Johnston was one of the 57 people who lost their lives.  The JRO is 5 miles from the volcano on the ridge wh...