Set for take-off in October and with ten years of space travel ahead of it, NASA's new Clipper spacecraft is unveiled in California. The five-billion-dollar probe will travel to Europa, one of Jupiter's dozens of moons, to search for the conditions necessary for life, including liquid water, which scientists believe to be present. The Clipper is expected to be in orbit around Jupiter and Europa in 2031, with its mission lasting until 2034.