Ukraine's air defence capability "was the theme of this entire day" says Mark Milley, US Chairman of the Joint Chiefs of Staff, talking at the Ramstein Air Base in Germany, where representatives from around 50 nations are discussing further possible support for Kyiv. "To take the Ukrainian Air Force from where it is today and build it up to match the Russian Air Force, that's a significant level of effort" Milley explains during a joint press conference with US Defence Secretary Lloyd Austin. IMAGES AND SOUNDBITES