[BusinessInsider] Japan's parliament voted into law Saturday a defense policy shift that could let troops fight overseas for the first time since 1945, a milestone in Prime Minister Shinzo Abe's push to loosen the limits of the pacifist constitution on the military.Abe says the shift, the biggest change in Japan's defense policy since the creation of its post-war military in 1954, is vital to meet new challenges such as from a rising China.