 NASA astronauts say they're not worried about Boeing's Starliner. They say they're certain the craft will be able to bring them back to Earth safely, despite the technical problems that have extended their mission. Multiple helium leaks and failures of the capsule's thrusters have been behind the delays, and the astronauts have been docked at the space station for more than a month. Neither NASA nor Boeing has set a return date. On Wall Street, a tech stock rally is leading all three averages about a half to one percent higher. The Dow is up 187, the Nasdaq 179.