HOUSTON Jul 19, (bdnews24.com/Reuters) - Spacewalking astronauts secured a "front porch" on Saturday to the International Space Station that will expose scientific experiments to the cold vacuum of outer space. Lead spacewalker David Wolf and rookie astronaut Timothy Kopra spent about 5 1/2 hours outside the station preparing the Japanese-built platform to be attached to the front of the station's $2.4 billion Kibo laboratory, Japanese for "hope." Then, using the station's robotic arm, astronauts gingerly drove the four-tonne platform to "hard dock" with the Kibo lab at 7:29 p.m. EDT. "It really...
