Slovenia’s Prime Minister Janez Jansa and Latvia’s Prime Minister Arturs Krisjanis Karins Slovakia’s Prime Minister Eduard Heger arrive for an European Union Summit at the European Council building in Brussels, Belgium December 16, 2021. Kenzo Tribouillard/Pool via REUTERS The European Union is under assault from Russia on multiple fronts and must unite behind new economic sanctions, Baltic and central European leaders said on Thursday, with Lithuania citing a risk of possible Russian military strikes from Belarus. The warnings at an EU summit were some of the most direct in recent weeks as the United States and its NATO allies seek...