The Russian president, Vladimir Putin, and Saudi Arabia's Crown Prince Mohammed bin Salman shared a joke at the G20 summit in Buenos Aires, laughing heartily as they took seats next to each other in the main meeting room. Earlier, the Saudi ruler was sidelined during the official 'family photo' of world leaders and other dignitaries, standing at the far edge of the group portrait and ignored. His presence at the international summit has been contentious following the killing of Saudi journalist Jamal Khashoggi at a Saudi consulate in Istanbul in October