10 Things to Know: Oct. 24

1. NYC DOCTOR TESTS POSITIVE FOR EBOLA

The physician, who treated patients in West Africa, is the fourth confirmed case in the U.S. and the first in the nation's biggest city.

2. POSSIBLE EXPLANATION EMERGES FOR DEADLY ATTACK IN CANADA

The gunman had talked about wanting to go to Libya or Syria, and may have lashed out in frustration over delays in getting a passport.

3. DEATHS AT US BORDER DROP TO 15-YEAR LOW

Officials credit increased rescue efforts as well as a Spanish-language media campaign discouraging Latin Americans from walking across the border.

4. EUROPE PLEDGES TO EASE GLOBAL WARMING

Meeting in Brussels, EU leaders agree to cut greenhouse gas emissions by at least 40 percent by 2030.

5. IRAQ MILITARY MAKING STRIDES

"We've seen them start to act like an army" in combating the Islamic State group, one American official says.

6. US PREPARING TO TRANSFER AFGHAN SUSPECT

The move by the Obama administration would mark the first time a military detainee from Afghanistan has been brought to the U.S. for trial.

7. DATING NO LONGER A GAME

Teen dating abuse - ranging from violence to taunts - is pervasive among American adolescents, a survey finds.

8. HOW ZUCKERBERG DELIGHTED AUDIENCE IN CHINA

The young Facebook billionaire used his recently learned Mandarin Chinese during a 30-minute chat at a Beijing university.

9. 'THE ROOSEVELTS' EARNS PBS BIGGEST AUDIENCE IN 20 YEARS

The seven episodes of Ken Burns' series that aired last month drew an average audience of 9.2 million viewers.

10. WHY LOTS OF BALLS BECOME ADVENTURES IN SAN FRANCISCO

Tight foul ground. Gusts that whip off McCovey Cove. Twilight starts. Pesky seagulls. The World Series, tied 1-all, is moving to the Giants' waterfront ballpark.