Keywords: US Navy 090324-N-2959L-143 Lt. Cmdr. Chris Cassidy receives help donning his space suit before a training session at the Neutral Buoyancy Laboratory (NLB) in Houston.jpg en HOUSTON March 24 2009 Lt Cmdr Chris Cassidy receives help donning his space suit before a training session at the Neutral Buoyancy Laboratory NLB in Houston The space suit will be pressurized with an additional four pounds of pressure per square inch to simulate the suit weight astronauts experience during spacewalks The NBL is a pool that simulates zero gravity to train astronauts for upcoming missions The NBL contains full mock-ups of the International Space Station for the astronauts to train with Cassidy a U S Navy SEAL is a mission specialist on the upcoming mission STS-127 to the International Space Station scheduled for June of this year U S Navy photo by Mass Communication Specialist 2nd Class Dominique M Lasco/Released 2009-03-24 090324-N-2959L-143 Navy http //www navy mil/view_image asp id 71986 U S Navy photo by Mass Communication Specialist 2nd Class Dominique M Lasco PD-USGov-Military-Navy Christopher Cassidy Neutral Buoyancy Laboratory |