than 4,300 pounds of science experiment results, unneeded items and trash. At 10:35 EDT, President George W. Bush had a private telephone conversation with the crew, during which he told the astronauts that they represent the best of service and exploration, and thanked them for the job they are doing. Pilot Mark Kelly suggested during an on-orbit press conference that the wake-up songs should be made known to the crew before they are woken up by them when he said: A third and final spacewalk to demonstrate shuttle repair techniques was carried out by Sellers and Fossum. Repairs were done on pre-damaged samples of heat shield materials brought into space on a special pallet in the payload bay of the shuttle. The repairs were expected to work best when the material has been warm and is cooling, so the actions were carefully coordinated by mission control with regard to exposure of the samples to sunlight. While the procedures, and NOAX (Non-Oxide Adhesive Experimental) material had been tested in a vacuum on Earth, the zero-G tests were required because of offgassing from the material and the potential for bubbles to form that could weaken the structure of the repair. Following a problem on the previous EVA where latches on a SAFER became detached, Kapton tape was used to ensure the latches remained closed on this EVA. Sellers lost one of the spatulas he was using to put the NOAX onto the samples of heat shield material. He tried to locate it himself with the assistance of Fossum, who said "Don't worry it happens." Mission controllers saw the spatula float away over the port side of the shuttle payload bay. The loose tool was determined not to pose a hazard to the mission. The Space Shuttle Discovery (STS-121) crew enjoyed a day off after having completed three successful space walks and transferring thousands of pounds of supplies and equipment earlier in the flight. Mission Specialist Mike Fossum received a call from Texas Governor Rick Perry, who, like Fossum, is a graduate of the Texas A&M University. He mentioned to Fossum how proud he was to have the first Aggie in space. "Aggies are all up in great arms to have the first Aggie in space," said Perry. "You are making some history, Michael." Later in the afternoon, Fossum and Nowak participated in live interviews with MSNBC and Fox News Live. Expedition 13