Olivas Extravehicular Mobility Unit (EMU) Prep

S128-E-007297 (4 Sept. 2009) ---- Astronaut John “Danny” Olivas, STS-128 mission specialist, checks out a power tool. The Space Shuttle Discovery is currently docked with the International Space Station while the STS-128 astronauts work with the Expedition 20 crewmembers aboard the orbital outpost. In the last several days, Olivas has already participated in two days of extravehicular activity and is preparing for his third and final spacewalk on Sept. 5.