Air travelers leaving Washington Airport during National Air Travel Week, Oct. 2. 9 are being given a special treat. Cakes baked from their favorite recipes are being put aboard each plane by chefs of the leading hotels in the Capitol. Marjorie McKinnon, Eastern Airline hostess, is pictured receiving the delicacies from (left to right) Theophile Homberger, Hotel Hamilton; Eddie Weber, Shoreham; Joseph Cattaneo, Washington; Fritz Meissner, Hay-Adams; Abraham Grob, Wardman Park; Joseph Tucci, Raleigh; Jacques Haerringer, Shoreham; Otto Merz, Willard, 10/4/38