Who was on the trip: Timmy Desmet (tedlab postdoc, founder of Profacts company, in Belgium), Barbara Hemforth (CNRS, Paris), my son Peter, and my son Mitchell

Commentary: This was a hike up Mt Washington on the Jewell trail, on the Cog Railway side of the mountain. Great shots of the old Cog Railway spewing tons of smoke. The Cog Railway finally went green a few years ago, so the Jewell trail is now pollution-free