听力原文：M: Hi, Janet, you are so lucky to be done with your final exams and term papers. I still have two more finals to take? W: Really? M: Yeah, So what you are doing this summer, anything special? W: Well, actually yeah. My parents have always liked taking my sister and me to different places in the United States. You know, places with historical significance. I guess they wanted to reinforce the stuff we learned in school about history. And so even though we are older now, they still do once in a while. M: Oh so where you're going this summer? W: Well, this summer it's finely going to be Gettysburg. M: Finely? You haven't been there yet? I mean Gettysburg, it's probably the most famous civil war site in the country. It's only a couple of hours away. You think that would be one of the first places that they've taken you to. I have been there a couple of times. W: We were gonna to go about ten, ah, no, it was exactly ten years ago, but I don't know, something happened, I cannot remember what. M: Something changed your plans? W: Yeah, don't ask me what it was, but we ended up not going anywhere that year. I hope that doesn't happen again this year. I wrote a paper about Gettysburg last semester for a hi. story class I was taking. Well, about the political situation in the United States right after the battle at Gettysburg. So I'm eager to see the place. What are the students mainly discussing?