President Donald Trump has promised retaliation against the Islamic State militant group after two US soldiers and an interpreter were killed in an ambush in Syria. Damascus has condemned the attack as well. Also: Israel says it has killed the senior Hamas commander Raed Saad. The opposition in Belarus celebrates the release of political prisoners. Chile's presidential election sees a communist candidate take on the far-right. And, with the latest Avatar film about to hit cinemas, we hear from the composer who spent years writing its score.

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