One week ago, gunfire broke the early morning quiet on the campus of Northern Arizona University in Flagstaff. A fight between two groups of students turned deadly when one of them - an 18 year old freshman - drew a gun and opened fire, killing one student and wounding three others. It was the first school shooting in NAU's 116 year history. Over the last week, students have been coming to terms with the tragedy, and wondering about their safety, talking about gun control. Arizona Public Radio's Justin Regan spoke with some of them and produced this audio postcard.