The Swedish institute expects the global nuclear arsenal to start growing for the first time since the end of the Cold War.
The U.S. became the first, and to this day only, nation in the world to use a nuclear weapon against a foreign adversary on August 6, 1945.
Dan Smith of the Stockholm International Peace Research Institute suggested nuclear weapon development was continuing despite rapprochement with the U.S.
The U.S. and China spent about $899 billion between them in 2018.
U.S. and Western European spending is on the slide as Eastern Europe rearms.
U.S. and Russia lead global rise in arms exports as Asian powerhouse overtakes Germany to become third-largest exporter.