Good morning: 10 things to know for Thursday

Late-breaking news, upcoming events and stories of interest:

1. THE POLITICS OF GUNS LEAPS TO THE TOP OF THE PRESIDENTIAL RACE. In the wake of the Colorado shootings, President Obama calls for stiffer regulations while Mitt Romney says he doesn't believe America needs new gun laws.

2. WHAT'S ON THE LINE FOR ROMNEY ABROAD. The GOP candidate's trip to Britain, Israel and Poland amounts to an international audition.

3. DOs AND DON'Ts FOR OLYMPIC TRAVELERS. Americans arriving for the London Olympics will find that the chasm between British and American English can seem as wide as the ocean that separates the two nations.

4. AS OLYMPICS NEAR, AN EMBARRASSING SECURITY BREACH. The 11-year-old boy didn't have a passport, didn't have a ticket, didn't have a boarding pass — and got all the way from England to Italy on his own.

5. FLAG FLAP AT THE OLYMPICS The South Korean flag is mistakenly displayed on a jumbo screen instead of North Korea's before a women's soccer match, prompting the North Koreans to refuse to take the field for nearly an hour

6. THE NEXT FRONTIER IN THE FIGHT AGAINST AIDS. The epidemic increasingly is a female one, and curbing it will require focusing on poverty and violence, not just pregnancy and pills.

7. USE OF SYNTHETIC DRUGS SURGES. People are inventing so many new, legal ways to get high that lawmakers can't seem to keep up.

8. THAT'S NO LADY. THAT'S MY WIFE. Now we know the identity of the mystery woman accompanying North Korean leader Kim Jong Un at recent public events.

9. A POSTHUMOUS REVELATION. In her obituary, which she co-wrote with her partner, pioneering astronaut Sally Ride disclosed publicly that she was gay.

10. WHY 'TWILIGHT' FANS ARE HEARTBROKEN. Kristen Stewart admits she cheated on her boyfriend and co-star Robert Pattinson. But the scandal seems unlikely to affect box-office returns.