
NATIONAL HARBOR, Md.--Space Exploration Technologies Corp. (SpaceX) hopes to make its debut launch of its Falcon Heavy rocket by the end of this year, according to a top official.SpaceX President Gwynne Shotwell said here Wednesday once the company launches Falcon Heavy it will then have three more flights to make in the following six months. The Falcon Heavy debut has been delayed since at least last summer. Its arrival is very anticipated as United Launch Alliance (ULA) is currently the…