On April 24, 1990, mankind launched the key to its future in space exploration -- the Hubble Telescope. But scientists immediately realized there was a problem -- the telescope was near sighted. As critics had a field day and Congress debated shutting NASA down, a few dedicated astronomers devised a plan to correct Hubble's faulty eyesight. After seven years of planning, a shuttle crew made the plan a reality. Now, Hubble is a time machine, able to see 10 billion years into the past -- almost as far back as the Big Bang.