NYC Pollution 1966.200DeadThanksgivingWeekend.NealBoenziNYT Published March 13, 2017 at 2048 × 1366 in Evening Prayer 3.13.17, James Theodore Holly, Bishop of Haiti & Dominican Republic, 1911 Some people think U.S. clean air laws are too strict. They ignore the fact that on Thanksgiving weekend in 1966, 200 people died in New York City breathing this poison. (Neal Boenzi/The New York Times)