Flight attendants at United Airlines have voted in favor of a strike authorization, the Association of Flight Attendants-CWA said Wednesday.Over 90% of the flight attendants participated, with 99.99% of the votes in favor of a strike authorization, the union said.It is the first time since the 2005 bankruptcy negotiations that flight attendants at United voted on strike authorization, it added.It is the first time since the 2005 bankruptcy negotiations that flight attendants at United voted on strike author ...