WASHINGTON (Reuters) - Sales of previously owned U.S. homes hit a six-month low in May and supply rose, pointing to a housing market still struggling to regain its footing. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=et1YJFmDT2s:2yma2S1Lyjg:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=et1YJFmDT2s:2yma2S1Lyjg:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/et1YJFmDT2s)