The International Space Station’s Expedition 30 crew – Commander Dan Burbank and Flight Engineers Anton Shkaplerov and Anatoly Ivanishin – performed science experiments and participated in an emergency drill Tuesday.

Burbank, a NASA astronaut, began his workday almost immediately after the crew’s regular 1 a.m. EST wakeup time as he conducted the Reaction Self Test. This 5-minute test helps crew members objectively identify any impacts to their performance caused by sleep loss, fatigue and disruptions to circadian rhythms.