When a mysterious document purporting to permit kohanim to attend medical school surfaces, controversy ensues—involving the likes of R. Shimon Schwab, R. Shlomo Goren, and, of course, R. Moshe Feinstein. In this week’s “Unpacking the Iggerot,” Moshe Kurtz takes us through a fascinating episode in contemporary halakha that has the potential to imperil the ambitions of many Jewish mothers who would like nothing more than say, “My son, Dr. Cohen”!