Examining U.S. foreign policy towards Syria, China

"Face the Nation" moderator and chief foreign affairs correspondent Margaret Brennan takes a look at whether the instability in Syria poses a threat to U.S. national security, and why President-elect Donald Trump invited Chinese President Xi Jinping to his inauguration.

Examining U.S. foreign policy towards Syria, China
"Face the Nation" moderator and chief foreign affairs correspondent Margaret Brennan takes a look at whether the instability in Syria poses a threat to U.S. national security, and why President-elect Donald Trump invited Chinese President Xi Jinping to his inauguration.