MOORHEAD — When George Pfeifer’s 60th Anniversary Retrospective opened at The Rourke Art Gallery + Museum in late May, it was something of a reunion for the artist. Not only did he reconnect with friends and followers he’s made over the years, but also the institution that not only gave him his first solo show, but employed and encouraged him in the early years. The exhibit also allowed him to reacquaint himself with works he hasn’t seen in more…