"We Walked Right Into It" focuses on a suburban Philadelphia high school community that saw 15 of its former students killed between 1965 and 1971 in a war conducted halfway around the world. This book begins with the story of "Christmas Officer" Joseph Yatsko, who wrote a letter to his alma mater in October 1965 asking for help in supplying his soldiers with Christmas cards and ornaments for their holiday far from home. Pennsbury High's student council...