President George W. Bush yesterday called the Space Shuttle Discovery to wish the astronauts well, congratulate them on their space walks, and invite them to the White House. Bush told the crew members that he had watched closely as astronauts Piers Sellers and Michael Fossum executed a space walk, according to White House spokesman Dana Perino. Bush said “the astronauts represent the best of service and exploration and thanked them for what they're doing,” Perino said. Bush told them: “When you're back, I hope you can come to the White House. Please bring your families. I want to welcome you to the White House,” according to Perino.