A senior US senator has called for the country to act with other nations in the wake of an alleged chemical attack atrocity in Syria to avoid getting into a "general military operation".
As the Russian foreign ministry urged the US against repeating the "mistakes of the past", Democrat Jack Reed said any American response must be international and not unilateral.
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Villarrica - one of Chile's most active volcanoes - has erupted, forcing the evacuation of nearby communities.
Footage showing the "truly shocking" moment a teenager was stabbed to death as he rode his bike with friends has been released.
Drinking three to five cups of coffee a day could reduce the risk of clogged arteries and thus heart attacks, a study has found.