Saudi King Salman bin Abdulaziz stressed Sunday during his speech in the Egyptian parliament on the need to unify the Arab visions to confront the challenges facing the Arab countries, Youm7 News reported. King Salman pointed out the Arab and Islamic countries must unify their positions in their war against terrorism, stressing on the need to form a joint Arab force. He added that Egypt and Saudi Arabia have historical relations, adding that Saudi Arabia aims to cooperate with Egypt through clear mechanisms. King Salman noted that during his visit to Egypt, the two countries signed a number of agreements, treaties and memorandums of understanding. He added that the two countries agreed on the establishment of a free trade zone in northern Sinai and a bridge linking between the two countries in order to boost the trade exchanges, considering it to be the Saudi gateway to the African continent.