President Trump says US immigration staff are facing an unprecedented increase in attacks by what he called 'Deranged Radical Leftists'; he made his comment after a deadly gun attack at an immigration centre in Dallas. 'Anti-ICE' messaging was found on ammunition at the scene. Also: Syria's first head of state to speak at the UN General Assembly for nearly sixty years calls for all sanctions on his country to be lifted, China commits to reducing its greenhouse gas emissions by up to ten percent, and we meet the history-making astronauts headed for the Moon.

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