Chad's President Idriss Deby, stressed during a press conference, with President Abdel Fattah Al-Sisi at Ittihadia Palace Sunday that the development efforts taken by Egypt strengthen the unity of the Arab world and the African continent. Also, Deby called upon the international community to provide the necessary support to solve the Libyan crisis politically and not by weapons, pointing out that dialogue is the only solution to resolve the crisis.