TAMPA: Two years after launching from Florida, a NASA spacecraft is closing in on an ancient asteroid, Bennu, for a sample of space dust that could reveal clues to the start of life in the solar system. The spacecraft, OSIRIS-REx, has even snapped its first, blurry pic of the cosmic body, which is about the size of a small mountain, about 500 yards (meters) in diameter. The spacecraft is designed to circle Bennu, and reach out with a robotic arm to "high-five" its surface, then return the sample it collects to Earth in 2023. The first images of Bennu were taken on August 17 at a distance of 1.4 million miles (2.3 million kilometers) from the $800 million spacecraft. "This is the closest we have even been to Bennu," said Dante Lauretta, OSIRIS-REx principal investigator at the University of Arizona, Tucson. "This is significant in that we are now in the vicinity of the asteroid, closer than we have ever been even during the close appro...