Friendly presidential moments (25 images)

President Carter and Israeli Prime Minister Menachem Begin embrace as Egyptian President Anwar Sadat watches September 17, 1978 during a ceremony in the East Room of the White house where two agreements providing for negotiations of a full Middle East peace treaty within three months was signed at the conclusion of the Camp David summit. (UPI Photo/Darryl Heikes/Files).

20 JUNE 1997-DENVER, COLORADO, USA: President Clinton, right, reacts to Russian President Boris Yeltsin's answer to a reporters question June 20 at a dinner gathering of world leaders attending the Denver Summit of the Eight. UPI jr/Jim Ruymen

Russian President Dmitry Medvedev (R) and Italian Prime Minister Silvio Berlusconi laugh during a joint news conference after their meeting in the Kremlin in Moscow on November 6, 2008. Both leaders meet for talks expected to include Moscow's relations with NATO and the European Union. (UPI Photo/Anatoli Zhdanov)

Iran's President Mahmoud Ahmadinejad (R) hugs Algerian President Abdelaziz Bouteflika (L) during a welcoming ceremony in Tehran, Iran on August 11, 2008. (UPI Photo/Mohammad Kheirkhah)