10 Things to Know: Dec. 10

1. SENATE REPORT LIFTS VEIL ON CIA'S HARSH INTERROGATIONS

Treatment in secret prisons after the Sept. 11, 2001, attacks was worse than the government told Congress or the public, congressional investigators say.

2. WHAT CIA FAILED TO ACHIEVE, ACCORDING TO REPORT

Probers cast doubt on the claim that interrogations of detainees led to the killing of Osama bin Laden.

3. GASOLINE FORECAST EVEN BRIGHTER FOR US MOTORISTS

The Energy Department again slashes its prediction for next year's average price of gasoline, this time to $2.60 a gallon.

4. WHICH TOPIC WAS DISCUSSED MOST ON FACEBOOK IN 2014

The World Cup got the most attention on the social network this year, Facebook says.

5. CLIMATE TALKS HARDLY GREEN

The Peru conference is expected to have the biggest carbon footprint of any U.N. climate meeting measured to date.

6. WHO ENDURED LONG DAY ON CAPITOL HILL

Obama adviser Jonathan Gruber appears before Congress and is raked by Republicans for what he calls "inexcusably arrogant" remarks about the passage of the health care law.

7. AL-QAIDA FREES FRENCH HOSTAGE AFTER ALLEGED KIDNAPPERS RELEASED IN MALI

The move rekindles the debate about whether Western governments should negotiate with terrorists.

8. HOW PRINCE WILLIAM REACTED TO BIRD'S-EYE VIEW OF NYC

"Wow, this is great!" the monarch says after stepping out of the 86th-floor observation deck of the Empire State Building.

9. JOAN RIVERS' WILL FILED

The comic's only child, Melissa Rivers, is named executor over a fortune estimated as high as $150 million.

10. NFL'S CAM NEWTON INJURED

The Panthers quarterback suffers fractures to his lower back in a two-vehicle crash near the team's stadium in Charlotte, North Carolina.