Rep. Gabrielle Giffords (D-Ariz.) made her first public appearance since being wounded in a tragic shooting in Tucson, Arizona earlier this year in which numerous victims were hurt or had their lives taken, ABC News reports. According to the outlet, Giffords attended a ceremony at Space Center Houston in Texas at which her husband astronaut Mark Kelly -- who recently announced his retirement from NASA, effective October 1 -- was awarded the Spaceflight Medal, which is given to shuttle members upon...