7PM This episode's headline: Arms Treaty Violations?; State of our States; Wayward Federal Dollars; Peggy of the Flint Hills. The guests include In Washington: Rep. JIM COURTER, Republican, New Jersey; JOHN STEINBRUNER, Brookings Institution; PAUL BLUSTEIN, Wall Street Journal; In New York: J. PETER GRACE, Chairman, Federal Cost Control Survey. Byline: In New York: ROBERT MacNEIL, Executive Editor; CHARLAYNE HUNTER-GAULT, Correspondent; In Washington: JUDY WOODRUFF, Correspondent