In efforts to establish a ceasefire in Gaza and ease regional tensions, a crucial round of negotiations is planned for Thursday in Doha. CIA chief William Burns, Qatari Prime Minister Mohammed bin Abdulrahman Al Thani and Egypt’s intelligence chief Abbas Kamel are set to take part, as they have in past talks, sources told dpa. David Barnea, head of the Mossad foreign intelligence service, is expected to represent Israel. Because Israel and the Palestinian Islamist movement Hamas are not negotiating one-to-one with each other, Qatar, Egypt and the United States act as mediators. Hamas said it w…