ABC新闻:美国宣布从叙利亚撤军 三名科学家分享2019年诺贝尔医学奖

The top stories today.
US troops have begun withdrawing from northern Syria, paving the way for a Turkish operation against Kurdish fighters. Donald trump announced that it was time for America "to get out of" what he called "these ridiculous endless wars". Some Republicans have accused the president of leaving Kurdish allies to die. The UN says its preparing for the displacement of civilians as Turkish forces prepare to invade.
City commuters are bracing for further disruption today, after a day of chaos caused by climate protesters. In Sydney, thirty-eight people were charged over protests yesterday, while ten were arrested in Melbourne. Around the world, hundreds of activists have been detained as large crowds brought parts of cities to a stand still, calling for action on climate change.
The Labor party says the number of people arriving and seeking asylum at Australian airports has reached a crisis point. Shadow Home Affairs minister Kristina Keneally says everyday 80 people are arriving in Australia by plane claiming asylum. She says 9 out of ten are found not to be refugees and that people traffickers are using scams to bring illegal workers into the country.

And three scientists who discovered how cells sense and adapt to changing oxygen levels have won this year's Nobel prize for Medicine. Sir Peter Ratcliffe, William Kaelin and Greg Semenza share the award. The Nobel Assembly says the trio has revealed the mechanism for one of life's essential processes. The discovery could help fight cancer and other diseases.