The astronauts are ready to come back to Earth on Friday. We hear about upgrading the Hubble Space Telescope, what age-old questions it's now prepared to address and whether manned space flight has a future. Also, President Obama announces the first-ever national emissions standards, and Britain's Speaker of Parliament is forced out for the first time in 300 years.
Banner image: (May 18, 2009) Astronaut John Grunsfeld, STS-125 mission specialist, participates in the mission's fifth and final session of extravehicular activity as work continues to refurbish and upgrade the Hubble Space Telescope. During the seven-hour and two-minute spacewalk, Grunsfeld and astronaut Andrew Feustel (out of frame), mission specialist, installed a battery group replacement, removed and replaced a Fine Guidance Sensor and three thermal blankets protecting Hubble's electronics.