"We can't condemn our kids and grandkids to a planet that is beyond fixing," Obama said in a video released ahead of an announcement of a plan to cut carbon emissions from U.S. power plants.
A Russian military pilot was killed after his Mi-28 attack helicopter crashed during a demonstration in central Russia.
Ruben Espinosa had reportedly sought refuge in the capital after being threatened in the state of Veracruz.
A little more than one year after New York legalized medical marijuana, the health department selected five organizations to grow and sell the product throughout the state Friday.
The U.S. Marine Corps declared the F-35B Lightning IIready for combat missions, a major milestone for the Pentagon's Joint Strike Fighter program and the most expensive weapons program in U.S. history.