Air pollution is the biggest environmental health risk in the world, says the World Health Organization.
One of the two men who escaped from a high-security prison in New York State is now in a hospital.
The founder of Space X says his company has launched a full investigation of a rocket that exploded on Sunday.
Officials from 57 countries gathered in Beijing on Monday to sign an agreement creating the Asian Infrastructure Investment Bank.
Banks and money machines are closed Monday in Greece.
It increasingly appears there will not be an agreement with Iran to limit its nuclear activities — at least not by June 30.