In the summer of 1970, an engaged, Jewish, student nurse and a wounded Vietnam vet from the south met in a New York VA hospital. This chapter marks the end of the beginning of their story. Mark Cahill’s body tensed at the familiar, rhythmic click of Gwen Kaplan’s footsteps approached his room. Not for the first time, he flashed back to their fight the day before he left town to spend Christmas with his family. He still co...