Those "NUKE B-CC" buttons, still merrily sported on bosoms at Bethesda-Chevy Chase High School. School biggies blasted they were "potentially disruptive," but spunky scholar Carl Leubsdorf Jr., son of the Dallas News bureau chieftain, spoke of the First Amendment, to the American Civil Liberties Union . . . Big brouhaha a-brewing at the State Department, soon, over "Showing the Flag: A Report From Inside a U.S. Embassy." (By Marguerite Michaels, it reads like a novel, is packed with real names, real people, real goofs, from the U.S. Embassy in Bogota) . . . Hooray, mistaken identity. The free-lance photog who crouched in seclusion in Palm Beach to snap Bobby Shriver and Tatum O'Neal actually caught Anthony Shriver, with Tatum O'Neal. (Tony's sweet 17, but a Bobby look-alike.) Well, that's that picture sorted out . . . The 200-year-old tree uprooted in the Great Wind the other day. It flattened the spiffy new wing of Sunny and Warren Adler's house--smack after his son's hell-on-the-hoof anti-Moonie editorial in Sunny's glossy little Dossier mag. "I know nobody did it," said Warren. "But I know some people pray a lot" . . . And lo, the buffalo on the Interior Department's stationery, which had spun from facing left to facing right, now faces left again, on news releases. What's going on?