"Wherever chaos and violence threatened American interests and human lives for nearly a half century, wherever there was a need for courage and insight, Richard Holbrooke showed up for duty. He spent his formative years as a young foreign service officer in Vietnam, where he worked in the Mekong Delta and then on the staffs of two American ambassadors, Maxwell Taylor and Henry Cabot Lodge. Given the storied expanse of his career, people sometimes forget that Richard wrote a volume of the Pentagon Papers, the seminal work that helped turn the course of the Vietnam War. As with all of us who served in Vietnam, Richard's experience there informed his every judgment, and instilled in him a lifelong commitment to work to ensure that peace and diplomacy prevailed over war."
"Richard never shied from the tough assignments, and he undertook his last one with the same determination that enabled him to - through sheer will - broker the peace agreement among the warring factions in Bosnia that resulted in the signing of the Dayton Peace Accords in 1995. He will always be remembered as a warrior for peace."
ABC News' Joshua Miller, Ned Potter, Kirit Radia and Jake Tapper contributed to this report. Additional reporting from The Associated Press.