SPECIAL PRAYERS will besaid tonight lor the four men missing in action. Cpl. Robert E. Tibbs, 22, son of Mr. and Mrs. Roy Tibbs, 1233 Smith Ave., has been m ssing since July 29.Missing since August 6, is Pfc. Robert Williams, 18, son of Mr. and Mrs. Charles Williams, 1709 Lawn Ave. Pvt. James Tuttle, 18, of 306 Gideon Rd., brother of Richard Tuttle, has been missing since November 2, while Cpl. Wilgus Pennington, 24, son of Mrs. Mary Ward of Church St., has not been heard from since late in November.