In a reversal, the Trump administration has abandoned a plan to strip international students of their visas if their coursework is entirely online. And, former Vice President Joe Biden, the presumptive Democratic nominee for the US presidential race, outlined a climate plan on Tuesday that would spend $2 trillion over four years investing in clean-energy infrastructure. Plus, at the International Ninja Research Center, students learn ancient espionage tactics from feudal Japan — and unlearn all the bad history they may have picked up from movies and video games.