I knew Dave at UC Davis, and then when I spent time in Prague after graduation. He was so helpful as I was navigating the new city, patient as I tried to learn the language and customs, and nice as I tried to find friends...I regret losing touch with him after I returned to the US, and will always have great memories of him. I just learned about this today and am so saddened by this loss, and my thoughts and prayers go out to his beautiful family. Sara(Brown) Lee