Ukrainian President Volodymyr Zelensky asked visiting US Secretary of State Antony Blinken on Tuesday for Patriot air defence systems for the city of Kharkiv despite Kiev officials saying there had been a slight “stabilization” at the front. Russia launched a major attack in the border region near Ukraine’s second biggest city four days ago, already capturing several Ukrainian villages, while it continues to bombard Kharkiv with missiles. Two Patriot systems are necessary to protect the north-eastern city and its surrounding area, which borders Russia, Zelensky said in Kiev during Blinken’s su…