Ukraine is aiming to deploy more advanced weapons in its push-back against Russian forces. President Volodymyr Zelenskiy says Ukraine has taken deilvery of a sophisticated air defence system, called NASAMS from the US. Russia currently controls around 15 percent of Ukraine – and, as we heard, Moscow is preparing to formally annex these areas following the so-called referendums. How will the NAMSAMS weapons systems change the way Ukraine fights this war?