French President Francois Hollande met with President Obama at the White House Tuesday to discuss the fight against ISIS in the wake of the Paris attacks.
World leaders are set to meet in Paris, trying to agree on how to combat climate change. Also attending will be California Gov. Jerry Brown, who is spearheading his own international climate movement.
China is building what could be the world's largest carbon market. Pilot programs are helping to lower emissions. But this is mostly due to slowing growth and the shift away from manufacturing.
France is still on high alert after the terrorist attacks earlier this month. An explosive belt suspected of belonging to the suspected eighth attacker was found in a trash can Monday night in Paris.
Turkey said the plane violated its airspace and that it had issued 10 warnings before firing. Russian President Vladimir Putin said the downing was a "stab in the back by the terrorists' accomplices."
Liberian officials announced a resurgence of the disease last week. Two of the boy's family members reportedly also have tested positive for the disease.
New York Times reporter C.J. Chivers discusses efforts by ISIS to weaponize a mysterious substance known as red mercury. "It's never been seen," he says. "It essentially is an urban legend."
Turkey says it shot down a Russian fighter plane which had violated its airspace. Russia says one of its planes was shot down over Syria by groundfire, and that it did not violate Turkish airspace.
Both countries oppose the Islamic State. But they have different goals in Syria and have been eyeing each other warily since Russia's military intervened recently.
British Prime Minister David Cameron is making a second attempt to persuade parliament to allow the Royal Air Force to take part in attacks on ISIS in Syria.