NASA Astronaut Mike Hopkins explains what it was like to live on the International Space Station for 6 months to seventh graders from Clear Spring Middle School at the Maryland Science Center in Baltimore, MD on Monday, June 9, 2014. Hopkins served on Expeditions 37 and 38 with Russian cosmonauts Oleg Kotov and Sergey Ryazanskiy and returned home in March, 2014. (Photo Credit: NASA/Aubrey Gemignani)