President Trump is vowing to retaliate after a deadly attack on American military personnel in central Syria over the weekend. Officials say the gunman was linked to the Islamic State, also known as ISIS.

Here & Now‘s Indira Lakshmanan speaks with Andrew Tabler, a senior fellow at the Washington Institute for Near East Policy, about what this attack shows about the current state of Islamic extremism and the security threats facing Syria just over a year after the fall of dictator Bashar al-Assad’s regime.

This article was originally published on WBUR.org.

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