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Teenagers painted rebel slogans on a school. They were later killed. Other riots broke out all over the country against the President's rule.
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The fighting is all over the country.
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Negotiations have failed and the fighting in Syria will not end anytime soon.
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Chemical weapons and airstrikes have been used by both sides. The use of chemical warfare has been deemed illegal by international law.
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By the end of the year, most of the hospitals and health-care buildings in Syria were out of commission.
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The UN is calling for $4.4 billion to help aid 5 million refugees in Syria's neighboring countries.