Generate a question that has the following answer: 1968 for the following movie plot: The film opens when Ron Kovic is a young boy living in Massapequa, Long Island, New York. He grows up in a patriotic and Catholic household, instilling within him a strong sense of pride in his country and his religion. As a teenager, and a top member of his high school's wrestling team, he proves himself physically fit and athletic, as well as an academically exceptional student. When local Marine recruiting NCOs visit his school and give Ron and his fellow seniors an impassioned lecture about the Corps, Ron decides to enlist. He misses his prom, because he is unable to get a date with his love interest, Donna. He confronts her at the prom and has a dance with her on his last night before leaving.The story then jumps to Kovic's second Vietnam tour in 1968. Now a Marine sergeant and on patrol, his unit massacres a village of Vietnamese citizens, believing them to be enemy combatants. During the retreat, Kovic becomes disoriented and accidentally shoots one of the new arrivals to his platoon, a younger Marine private first class, Wilson, who ends up in the line of fire between sides. Despite the frantic efforts of the Navy Corpsman present who try to save him, Wilson dies from his wounds. Overwhelmed by guilt, Kovic appeals to his executive officer (XO), who merely tells him to forget the incident. The meeting has a negative effect on Ron, who is crushed at being brushed off by his XO.The platoon goes out on another hazardous patrol on January 20. During a firefight, Kovic is critically wounded, shot in the ankle and through the chest, smashing his spine. He lays trapped in a field facing sure death, until a fellow Marine rescues him. Paralyzed from the mid-chest down, he spends several months recovering at the Bronx Veterans Administration hospital. The living conditions in the hospital are deplorable; rats crawl freely on the floors, the staff is generally apathetic to their patients' needs, doctors visit the patients infrequently, drug use is rampant, and equipment is too old and ill-maintained to be...
The answer to this question is:
In which year did Kovic return home ?