By Trevor Hunnicutt and Jeff Mason WASHINGTON (Reuters) -President Joe Biden called former Secretary of State Madeleine Albright a “force of nature” on Wednesday at a memorial service attended by former presidents in honor of the first woman to serve as the United States’ top diplomat. Albright, who served as secretary of state from 1997 to 2001, died last month of cancer. The professor, businesswoman, mother and grandmother was heralded as a trailblazer after her death. Biden praised Albright for her grace, humanity and intellect, and said she changed the tide of history. “Her story was Ameri…