Of all the graduates receiving their diplomas this season, the one we salute this morning is Bret Woellner. He is the Columbia University graduate student who was commissioned a second lieutenant in the United States Army yesterday in the first joint commissioning ceremony ever held at the White House for graduates of the Reserve Officer Training Corps. All of the ROTC graduates are men and women who made extraordinary sacrifices as students. But Mr. Woellner was among a select group who made a double sacrifice, because Columbia, like several other universities who had graduates at the White House yesterday, bans ROTC from campus. So Mr. Woellner had to travel to Fordham to do his military studies.