U.S. prosecutors probe ex-NASA official, Boeing over space contract - sources

The U.S. Justice Department has opened a criminal probe into whether NASA's former head of human spaceflight gave Boeing Coimproper guidance during a lucrative lunar-lander contract competition, two people familiar with the matter said on Friday.The Justice Department has sent subpoenas to NASA, Boeing and Doug Loverro, who led the agency's marquee space travel program until he resigned abruptly in May, as part of a grand-jury investigation into the possible violation of federal procurement laws