Eiffel Tower closed for fourth day as staff continue strike

France's iconic Eiffel Tower was closed for a fourth day on Thursday as employees extended a strike over the monument's management, unions said. The stoppage at one of the world's best-known tourist sites is the second within two months in protest of what unions say is insufficient investment.The tower's operator, SETE, has advised ticket holders to check its website before showing up, or to postpone their visit. E-ticket holders were asked to check their e-mails for further information.Ticket h