President Joe Biden and President Volodymyr Zelensky will sign a bilateral security agreement between the United States and Ukraine on the sidelines of the G7 summit in Italy on Thursday. Biden’s National Security Adviser Jake Sullivan announced the deal to journalists on Wednesday during the flight to Italy, which is hosting the two-day summit of Group of Seven (G7) leaders in the southern city of Bari. Fifteen countries have already concluded similar long-term security agreements with Ukraine, including Britain, France and Germany. Sullivan said the Biden administration’s negotiations with K…