As the presidential race enters its final week and the candidates step up their efforts to woo the space vote, both sides are trotting out the biggest space guns they can find: Apollo astronauts. Over the weekend, Apollo 7 astronaut Walt Cunningham toured cities around Florida to help promote Republican hopeful Sen. John McCain’s campaign by backing the candidate and his space platform. Cunningham said he had never campaigned for a candidate before but said that unlike Democratic contender Sen. Barack Obama, McCain had a track record supporting NASA and was more reliable on the issue. Obama, he said, was...