During a spacewalk early in his career, @astro_luca's helmet began to malfunction. As it began to fill with water, Luca couldn't breathe, communicate or even see, relying on his safety tether to return to the airlock and safety. He handled the life-threatening crisis with so https://t.co/jVDX20XmjE #Spacewalk #AstronautSafety #LucaParmitano #Nospecificcountrycodesarementionedinthetweet.
