CNBC: U.S. Airways - America West merger Thursday May 19, 3:40 PM EDT NEW YORK (Reuters) - U.S. Airways Group Inc. (UAIRQ) and America West Holdings Corp. (AWA) are set to announce an agreement to merge after the close of trading on Thursday, business news television station CNBC reported. An industry source told Reuters last week that a merger announcement was close, adding that the deal would probably begin as a marketing alliance and unfold in stages. ?2005 Reuters Limited. Roger EWROPS