David McKean was director of policy planning at the State Department for Secretary of State John Kerry from 2013 to 2016 and served most recently as U.S. ambassador to Luxembourg.
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David McKean
TOPSHOT - A Venezuelan opposition activist is backdropped by a burning barricade during a demonstration against President Nicolas Maduro in Caracas, on April 24, 2017.
Protesters rallied on Monday vowing to block Venezuela's main roads to raise pressure on Maduro after three weeks of deadly unrest that have left 21 people dead. Riot police fired rubber bullets and tear gas to break up one of the first rallies in eastern Caracas early Monday while other groups were gathering elsewhere, the opposition said.
/ AFP PHOTO / Ronaldo SCHEMIDT (Photo credit should read RONALDO SCHEMIDT/AFP/Getty Images)
BEIJING, CHINA - NOVEMBER 12: Chinese President Xi Jinping (R) answers media's question during a press conference with U.S. President Barack Obama at the Great Hall of People on November 12, 2014 in Beijing, China. U.S. President Barack Obama pays a state visit to China after attending the 22nd Asia-Pacific Economic Cooperation (APEC) Economic Leaders' Meeting. (Photo by Feng Li/Getty Images)
WASHINGTON, DC - FEBRUARY 02: Secretary of State Rex Tillerson greets employees upon his arrival at the State Department, on February 2, 2017 in Washington, DC. Last night Tillerson was sworn in after confirmation by the U.S. Senate. (Photo by Mark Wilson/Getty Images)