After returning from space after five months on the ISS, I wasn't sure if/when I would get to fly again. But one day –about three years later--I did get the call I had waited for. Usually, your astronaut boss makes the call, but in this case Steve Lindsey asked me to visit him in his office. Usually, this meant I was in trouble. His first words were, "Hey Clay, do you want a flight?" Not being too sure of what he was suggesting, I replied with “… where, to Ohio or someplace?” He was not amused as he said, “No…, back to the ISS with the crew of STS-131 on Discovery.” Well, at this point he had my undivided attention! Naming off my potential crewmates, I felt blessed. They were all quality individuals, and I had flown with a few of them already. And the mission duration was only going to be a couple of weeks. The mission also included 3 more spacewalks. That was all quite plausible from my family’s perspective. I'm so glad I could experience both long and short-term missions; I wouldn't trade the experiences for anything - especially the day this photo was taken! I’m on an EVA with crewmate Rick Mastracchio, as we tackled the replacement of an ISS Ammonia Tank. Hmmm, I guess I have this “thing” for ammonia?! ;0)