View image in fullscreenKyiv, UkraineTeenagers Yaroslav and Darina hug at the site of a Russian missile strike on a residential building. Russia is exploiting a global shortage of Patriot air defence interceptor missiles as it increases attacks on Ukraine amid warnings that the shortfall is creating a ‘window of vulnerability’ for the countries that rely on them.Photograph: Efrem Lukatsky/APShareView image in fullscreenKyiv, UkraineResidents look out from a broken window in a residential building damaged by a Russian strike.