Mostafa Khalil President Anwar Sadat on his historic first visit to Jerusalem, Israel, in November 1977 to meet with the Prime Minister of Israel Menachem Begin. Khalil was the secretary general of the Arab Socialist Union at the time. The visit by Sadat and Khalil paved the way for negotiations by United States President Jimmy Carter, which ultimately led to the Camp David Accords. Former United Nations Secretary General Boutros Boutros-Ghali, who served as the deputy prime minister for foreign affairs, and also travelled with Khalil and Sadat to Israel in 1977, has talked about the important role which Khalil played in
Anwar Sadat of Nasserism, re-instituting a multi-party system, and launching the Infitah economic policy. As President, he led Egypt in the Yom Kippur War of 1973 to regain Egypt's Sinai Peninsula, which Israel had occupied since the Six-Day War of 1967, making him a hero in Egypt and, for a time, the wider Arab World. Afterwards, he engaged in negotiations with Israel, culminating in the Egypt–Israel Peace Treaty; this won him and Israeli Prime Minister Menachem Begin the Nobel Peace Prize, making Sadat the first Muslim Nobel laureate. Although reaction to the treaty—which resulted in the return of Sinai to Egypt—was generally