This episode's headline: NASA Under Attack; Phil Gramm: Budget Balancer; Aid for Contras. The guests include In Washington: Lt. Col. EDWARD KING (Ret.), Military Consultant; Rep. BOB LIVINGSTON, Republican, Louisiana; Rep. DAVE McCURDY, Democrat, Oklahoma; In Denver: Gen. JOHN SINGLAUB (Ret.), Coalition for World Freedom; Reports from NewsHour Correspondents: KWAME HOLMAN, in Kokomo, Indiana; JOHN MARKS (Visnews), in Italy; ELIZABETH BRACKETT, in Washington. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor; JUDY WOODRUFF, Correspondent