We hiked a windy trail for miles along the Étretat cliffs, in the northwest of Normandy, near the English Channel.  This was a favorite location of Impressionist painter Claude Monet.  He moved to several locations along the cliffs to capture the Manneporte rock arch in 1883.   The painting even has sand imbedded in the paint!  The Impressionist movement was characterized by visible brush strokes capturing ordinary subject matter with an emphasis on the changing light.  This was only possible because the artists weren’t bound to a studio.  Once tin paint tubes were invented in 1841, artists could take their painting outside.  Pierre-Auguste Renoir said, “Without colors in tubes, there would be no Cézanne, no Monet, no Pissarro, and no Impressionism.” Some revolutions began with the squeeze of a trigger; others required just the squeeze.