U.S. President Bill Clinton is present at the signing of the 1993 peace accord between Israel and the Palestinians on the White House Lawn with Israeli Prime Minister Yitzhak Rabin, left, and PLO chairman Yasser Arafat, right. (Sept, 13, 1993)
South African State President F W de Klerk shakes hands with African National Congress President Nelson Mandela, right, at the end of the talks between the Government and anti-apartheid groups to end white-minority rule in Johannesburg, South Africa (Dec. 21, 1991)
Chairman Mao Tse-tung, left, and U.S. President Richard Nixon shaking hands as they meet in China. Nixon's visit, Feb. 21-28, marked the first U.S. presidential visit to the People's Republic of China.
U.S. President Ronald Reagan, left, and Soviet leader Mikhail Gorbachev shake hands at the steps of the villa Fleur d'Eau at Versoix, Switzerland (Nov. 19, 1985 )