An Ukrainian Territorial Defence fighter takes the automatic grenade launcher from a destroyed Russian infantry mobility vehicle GAZ Tigr after the fight in Kharkiv on February 27, 2022. - Ukrainian forces secured full control of Kharkiv on February 27, 2022 following street fighting with Russian troops in the country's second biggest city, the local governor said. (Photo by Sergey BOBOK / AFP)
Russian President Vladimir Putin's announcement that his nuclear forces were on alert sparked outcry in the West as the invading troops faced stiff resistance on Monday.