Defense budget shifts U.S. military's focus from terrorism to China and Russia

U.S. Defense Secretary Jim Mattis, left, at the Demilitarized Zone in the border village of Panmunjom in Paju, South Korea in October 2017.
U.S. Defense Secretary Jim Mattis, left, at the Demilitarized Zone in the border village of Panmunjom in Paju, South Korea in October 2017.