It has been a particularly intense week in Ukraine - on Monday and Tuesday, it saw some of its heaviest Russian bombardment in months when more than 100 missiles were launched, hitting energy infrastructure and other non-military targets including a children's playground.Russian President Vladimir Putin says the missile strikes were retaliation for an attack on a key bridge linking Russia and Crimea - Ukraine's southern peninsula annexed by Moscow in 2014."Russia's latest indiscriminate strikes on civilian areas in Ukraine warrant further support to those seeking to defend their nation," said Defence Secretary Ben Wallace.Speaking after the Brussels meeting on Wednesday, US Defence Secretary Lloyd Austin said "we're going to do everything we can to make sure that they [Ukrainians] they have what's required to be effective".In his video address late on Wednesday, the Ukrainian leader said: "The more audacious and cruel Russian terror becomes, the more obvious it is to the world that helping Ukraine to protect the sky is one of the most important humanitarian tasks for Europe of our time.""