Mr. Van Dusen’s letter caught my eye, but not for its actual subject. It was his last teaching topic — selecting people for a lunar colony. Four of the six Apollo landings happened during my time at Princeton. Thinking back on watching them in the (former) Princeton Inn, did any of us in the tube room expect that we wouldn’t see footprints on Mars by our 50th reunion?

Rick Mott ’73
Ringoes, N.J.