A four-week conference at the United Nations to review the treaty to prevent the spread of nuclear weapons has ended without an agreement as the United States and Iran spar over Iran's nuclear program.

Surveillance systems in American schools increasingly monitor everything students write on school accounts and devices.

An Australian man was sentenced to 12 years and seven months in prison for the 1988 murder of an American who fell off a Sydney cliff that was known as a gay meeting place.

A man told police he killed American mathematician Scott Johnson in 1988 by pushing the 27-year-old off a Sydney cliff in what prosecutors describe as a gay hate crime.