Steve Forbes breaks down the three critical tests facing the U.S.—the Iranian nuclear threat, China's ambition to take over Taiwan, Russia's war in Ukraine,—and explains what President Trump must to do ensure U.S. and global security. Read the full story on Forbes: Subscribe to FORBES: https://www.youtube.com/user/Forbes?sub_confirmation=1 Fuel your success with Forbes. Gain unlimited access to premium journalism, including breaking news, groundbreaking in-depth reported stories, daily digests