It's fall in New England, and the trees that line the banks of the Charles River are ablaze in brilliant shades of copper, crimson and gold.  Each October, thousands of spectators line her shores for the Head of the Charles Regatta, the largest two-day boating race in the world.  We gathered with friends at Reunion Village to cheer the racers on, then headed cross the river to Harvard where we whiled away the last moments of a perfect autumn afternoon.