 Today is the 25th anniversary of the Boundary Waters Blowdown. On July 4, 1999, straight-line winds reaching 100 miles per hour tore through the wilderness, knocking down tens of millions of trees. There were between 3,000 to 4,000 campers in the wilderness at the time. About 60 people were injured, some seriously, but no one died. Kerry Griffith is author of the recent book, Gunflint Falling Blowdown in the Boundary Waters.