NATO defence ministers are meeting in Brussels on Friday for their second consecutive day of talks on formalizing the alliance’s support for Ukraine. NATO countries have been coordinating support to Ukraine through an informal, United States-led group called the Ukraine Defence Contact Group. But now NATO countries are discussing ways to shift that responsibility to the formal structures of NATO. On Friday, ministers are expected to give the nod to a plan for a mission called NATO Security Assistance and Training for Ukraine (NSATU) – which was already approved at a lower level on Thursday, al…