NASA says it accidentally sent out an emergency signal meant for training purposes - NPR

* NASA says it accidentally sent out an emergency signal meant for training purposes  NPR
* ISS emergency: NASA medical drill for astronauts accidentally airs  NBC News
* 'No emergency situation' on International Space Station, NASA says after astronaut medical drill audio causes stir  Space.com
* Nasa says no emergency onboard ISS after ‘disturbing’ medical drill accidentally airs  The Guardian
* NASA accidentally broadcasts simulation of astronaut in distress  Sky News


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