Dhaka, April 26 -- US President Donald Trump's envoy Steve Witkoff met President Vladimir Putin in Moscow on Friday at what Trump has said is a key moment in diplomacy to end the war in Ukraine.Witkoff has emerged as Washington's key interlocutor with Putin as Trump pushes for a deal to end the war, and has already held three long meetings with the Kremlin leader.Video published by the Kremlin showed Witkoff and Putin shaking hands and exchanging pleasantries before sitting down on opposite sides of a white oval table.Putin was accompanied by his foreign policy adviser Yuri Ushakov and investment envoy Kirill Dmitriev.Witkoff's latest visit to Moscow comes a day after Trump criticised a Russian missile and drone attack on Kyiv that killed a...