After signing a security agreement with Britain, Ukrainian President Volodymyr Zelensky is hoping for similar agreements with other countries. “We will keep working with other partners to ensure the development of our security,” the president wrote on Facebook on Sunday. “We are making Ukraine stronger step by step.” The agreement with Britain gives Ukraine security while it defends itself against “Russian aggression,” Zelensky wrote. At the same time, it “lays the groundwork for strong security positions until Ukraine joins NATO.” The agreement with the UK was signed on Friday during a visit …