• Visas

Nasa excludes Chinese researchers due to “national security”

Homeland Security is also considering fixed terms for F and J visas to prevent “fraud and abuse”

Nasa logo at the Kennedy Space Center Visitor Complex
iStock.com/Delpixart
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Izzy Wood
Reporter

The US is tightening its approach to international scientific collaboration, with Nasa confirming it has revoked access for Chinese nationals working at its facilities. 

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