President Obama, Former President Clinton, Secretary Clinton and Samantha Power at Richard Holbrooke's Memorial

President Barack Obama, with from left; Kofi Annan, former Secretary General of the United Nations, for President Bill Clinton, Secretary of State Hillary Rodham Clinton, and Samantha Power, NSC Director of Multilateral Affairs, listen to one of the speakers at Ambassador Richard Holbrooke’s memorial service at the Kennedy Center in Washington, D.C.,