Putin watches first Russian nuclear drill since invasion of UkraineVladimir Putin has overseen annual nuclear exercises by Russia's strategic nuclear forces at a time of heightened tensions with the West over his eight-month-long war in Ukraine.And Kyiv has warned that the claims indicate Moscow itself could be preparing such an attack.The Western defensive alliance said training flights involving 14 countries were taking place until Sunday over Belgium, the UK and the North Sea.Defence Minister Sergei Shoigu was seen on Russian TV saying that the aim of the drill was for military command and control to practise carrying out "a massive nuclear strike by the strategic nuclear forces in retaliation for the enemy's nuclear strike".Footage was also broadcast of remarks he gave via videolink to a conference of regional intelligence services in which he doubled down on his accusations of a Ukrainian dirty bomb plot."