The group's claim of responsibility has not been officially confirmed but, if true, would announce the first attack by ISIS in Afghanistan.
Data from three separate analyses shows this year might break 2014's record as the hottest year ever.
The teenagers were arrested on suspicion of being "associates" of an ISIS sympathizer, who was shot dead by Melbourne police in September after he stabbed police officers.
The leader of the Donetsk People's Republic says there was a 90 percent chance of war between his forces and Kiev.
U.S. defense officials expressed concern that a naval clash between Iranian and Saudi vessels could lead to an international conflict.
Pacific Gas & Electric, which operates the pipeline, has been criticized for its safety procedures since a 2010 explosion killed eight people.
The air base is highly unpopular with residents of Okinawa island, where some of the fiercest ground battles of World War II took place.
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