Rabbi Hershel Schachter Senior Halachic Consultant, OU Kashruth Division

We think of pork as "very unkosher"--but an aphid is even worse! Rabbi Schachter, a senior Halachic Consultant for OU Kosher and Rosh Yeshiva at New York's Yeshivas Rabbenu Yitzchok Elchanon, reveals to us the concerns that are addressed in certifying vegetables.