Fiame Naomi Mata'afa was sworn in as Samoa's first woman prime minister at an extraordinary makeshift tent ceremony Monday, as the islands' long-ruling government refused to cede power and locked the doors of parliament. The ad-hoc ceremony -- which is likely to face a court challenge -- caps six weeks of legal and political wrangling following a vote that was lost by Tuilaepa Sailele Malielegaoi, prime minister of 22 years. str-ns/arb/je