The airway monitoring research is getting more info on how our lungs react to Nitrogen Oxide – testing astronauts in reduced pressure in the @Space_Station airlock. Many astronauts have taken part, @Astro_Alex is next. #Horizons https://t.co/IxCBZcqGim pic.twitter.com/Qd9etmMWGQ

— Human Spaceflight (@esaspaceflight) April 17, 2018