By MICHAEL CASEY, Associated Press BOSTON (AP) — At this time of the year, The Friendly Fisherman on Cape Cod is usually bustling with foreign students clearing tables and helping prepare orders of clam strips or fish and chips. But because of a freeze on visas, Janet Demetri won't be employing the 20 or so workers this summer. So as the crowds rush back, Demetri must work with nine employees for her