Social media users were obsessed with the mysterious glowing orb, above, that Mr. Trump, King Salman of Saudi Arabia and President Abdel Fattah el-Sisi of Egypt gathered around. (Spoiler: It’s just an illuminated globe.)
Back in the U.S., a letter from a top Democrat revealed that Mr. Trump’s former national security adviser, Michael Flynn, lied to Pentagon investigators about his income from Russian companies and contacts with Russian officials when he applied for a top-secret security clearance last year.
• South Korea said North Korea’s most recent missile test, using a solid-fuel rocket, may have provided data that could advance the North’s weapons program.
Our science reporter looked to the history of the U.S. nuclear program for insights into