David B. Shear
David Shear is the United States Ambassador to Vietnam as of August 4, 2011. Shear was formerly deputy assistant secretary for East Asian and Pacific affairs at the U.S. Department of State; he joined the State Department in 1982 and has served in Washington, Tokyo, Beijing, Kuala Lumpur and Sapporo. Wikipedia*
On the C-SPAN Networks:
David B. Shear has four videos in the C-SPAN Video Library; the first appearance was a 2010 House Committee as a Deputy Assistant Secretary for the Bureau of East Asian and Pacific Affairs of the Department of State. The year with the most videos was 2015 with two videos. Most common tag: Pacific Rim.