Usually, it's the history-making ones that the world remembers -- think Nixon and Castro, Kennedy and Khrushchev, Churchill and... anyone, really. US President Donald Trump treats Japanese Prime Minister Shinzo Abe to a 19-second handshake , complete with several pats on the hand, when they meet in the Oval Office on February 10, 2017. Here he is with then-Australian Prime Minister Tony Abbott (C) and Abe (R), at a trilateral meeting at the G20 Summit on November 16, 2014 in Brisbane, Australia. Nothing says "Gulf Cooperation" like these smiles, as Obama meets Bahraini Crown Prince Salman bin Hamad al-Khalifa at the White House in Washington, DC, on May 13, 2015. Calm before the stormMeanwhile, in better times, UK Prime Minister David Cameron meets at Downing Street with German Chancellor Angela Merkel on February 27, 2014, but things seem to have gotten off to an awkward start.

Source: CNN February 11, 2017 10:30 UTC