By Pavel Polityuk, Humeyra Pamuk and Caleb Davis KYIV/NEW YORK/GDANSK, Poland (Reuters) – President Vladimir Putin ordered Russia’s first wartime mobilisation since World War Two on Wednesday, shocking citizens with what Western countries described as an act of desperation in the face of a losing war. Putin made the announcement in a televised address in which he also announced moves to annex swaths of Ukrainian territory and threatened to use nuclear weapons to defend Russia, declaring: “It’s not a bluff”. Flights out of Russia quickly sold out, and jailed opposition leader Alexei Navalny cal…