Russian and Ukrainian delegates met in Istanbul on Monday for their second set of direct peace talks, a day after Kyiv launched a shock drone attack on Russia’s nuclear-capable bombers, in an operation that President Volodymyr Zelensky said was a year and a half in the making.

Delegations from Russia and Ukraine are in Turkey for their second round of direct peace talks in just over two weeks.

Despite the flurry of diplomacy, the two nations engaged in Europe’s largest conflict since World War II remain far apart.