By April 2011, the capabilities and performance of the Falcon 9 vehicle were better understood, SpaceX having completed two successful demonstration missions to LEO, one of which included reignition of the second-stage engine. At a press conference at the National Press Club in Washington, DC. on April 5, 2011, Musk stated that Falcon Heavy would “carry more payload to orbit or escape velocity than any vehicle in history, apart from the Saturn V Moon rocket . . . and Soviet Energia rocket”. In the same year, with the expected increase in demand for both variants, SpaceX announced plans to expand manufacturing capacity “as we build towards the capability of producing a Falcon 9 first stage or Falcon Heavy side booster every week and an upper stage every two weeks”.