Thanksgiving Day, annual national holiday in the United States and Canada celebrating the harvest and other blessings of the past year. Americans generally believe that their Thanksgiving is modeled on a 1621 harvest feast shared by the English colonists (Pilgrims) of Plymouth and the Wampanoag people. The American holiday is particularly rich in legend and symbolism, and the traditional fare of the Thanksgiving meal typically includes turkey, bread stuffing, potatoes, cranberries, and pumpkin pie. With respect to vehicular travel, the holiday is often the busiest of the year, as family members gather with one another. Plymouth’s Thanksgiving began with a few colonists going out “fowling,” possibly for turkeys but more probably for the easier prey of geese and ducks, since they “in one day killed as much as…served the company almost a week.” Next, 90 or so Wampanoag made a surprise appearance at the settlement’s gate, doubtlessly unnerving the 50 or so colonists. Nevertheless...