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US officials hope to deliver about 300 million doses of a coronavirus vaccine by early 2021.

US President Donald Trump speaks at the National Association of Realtors' Legislative Meetings & Trade Expo in Washington, US, May 17, 2019. [Photo/Agencies]

US President Donald Trump holds a campaign rally in Sunrise, Florida, US, Nov 26, 2019. [Photo/Agencies]

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US President Donald Trump is expected to announce plans to withdraw part of the troops from Afghanistan, media reported, after peace talks resumed a week ago between the United States and the Taliban.

US Vice President Mike Pence addresses the Knesset, Israeli Parliament, in Jerusalem January 22, 2018. [Photo/Agencies]

US bank Goldman Sachs said in a note to clients this week that the success of Shanghai’s crude futures was “indirectly promoting the use of the Chinese currency.”

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US physicist Earl Plummer sees a bright future for China's further progress in science. Liu Xiangrui reports.

US President Donald Trump speaks during a coronavirus disease (COVID-19) pandemic briefing at the White House in Washington, US, August 10, 2020. [Photo/Agencies]

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US media have frequently reported the policy wrangle between US hawkish officials, such as National Security Adviser John Bolton, and others within the Trump administration regarding the approach to deal with the rising tensions with Iran.

US Secretary of State Mike Pompeo has said it may take "a handful more weeks" before Washington has enough evidence to impose sanctions on individuals responsible for the killing of Saudi journalist Jamal Khashoggi.