Brian P. McKeon was a senior national security official in the White House and the Pentagon under President Obama.
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Brian P. McKeon
CIA Director Gina Haspel arrives to brief legislators on the killing of journalist Jamal Khashoggi on Capitol Hill on Dec. 12. (Saul Loeb/AFP/Getty Images)
US President Donald Trump departs after delivering a statement on Syria from the Mar-a-Lago estate in West Palm Beach, Florida, April 6, 2017.
Trump ordered a massive military strike against a Syria Thursday in retaliation for a chemical weapons attack they blame on President Bashar al-Assad. A US official said 59 precision guided missiles hit Shayrat Airfield in Syria, where Washington believes Tuesday's deadly attack was launched.
/ AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
WASHINGTON, DC - FEBRUARY 28: (AFP OUT) U.S. President Donald J. Trump (C) delivers his first address to a joint session of the U.S. Congress as U.S. Vice President Mike Pence (L) and Speaker of the House Paul Ryan (R) listen on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress focused on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images)
WASHINGTON, DC - FEBRUARY 28: (AFP OUT) U.S. President Donald J. Trump (C) delivers his first address to a joint session of the U.S. Congress as U.S. Vice President Mike Pence (L) and Speaker of the House Paul Ryan (R) listen on February 28, 2017 in the House chamber of the U.S. Capitol in Washington, DC. Trump's first address to Congress focused on national security, tax and regulatory reform, the economy, and healthcare. (Photo by Jim Lo Scalzo - Pool/Getty Images)