The presidents of the United States and Ukraine have signed an agreement laying out Washington’s long-term security relationship with Kievon the sidelines of the G7 in southern Italy on Thursday. US President Joe Biden and Ukrainian President Ukrainian President Volodymyr Zelensky signed the bilateral deal that comes after 15 countries concluded similar long-term security agreements with Kiev including Britain, France and Germany. Biden’s National Security Adviser Jake Sullivan said on Wednesday that the agreement would not include the obligation for Washington to deploy US troops to Ukraine, …