Queue up the vintage Ellis Island footage with quaint music …NEW BEDFORD, Mass. (AP) -- Immigrants brought prosperity to New Bedford. They manned its lucrative whaling fleet, ran its textile mills and provided the muscle for the fishing boats that leave here daily for the Atlantic. But this New England city, which occasionally gives a knowing wink-and-nod at its illegal immigrant population, found itself in turmoil Wednesday, one day after federal agents raided a leather factory and detained more than 300 undocumented workers. Play audio clip from that movie voice-over guy…“But a new wind was blowing...”