Lunar lander issue complicates privately led U.S. moon mission
A robotic lander built by a private company suffered a technical problem on its way to the moon on Monday, threatening to upend the first U.S. soft lunar landing in over 50 years.The issue with the lander's propulsion system followed a successful launch of a new Vulcan rocket debuted by a joint venture of Boeing and Lockheed Martin.Space robotics firm Astrobotic's Peregrine lunar lander launched at 2:18 a.m. ET from Cape Canaveral, Fla., on the first flight of Vulcan, a powerful rocket that had been under development for…