Regular testing of equipment, intended for flight on Mars, NASA has experienced before. This time, the designers of the American space Agency tested the engines of future missiles. Specifically, the experts felt engines operating on liquid oxygen and complex management. Also, in the test checked the pressure inside the fuel tanks. This experiment, in which the engines were proportionately 500 seconds was carried out in the center for space research them. John Stennis. To mount and test innovative rocket engines will protestiryut no less than eight times. They start in the middle of the spring of the current year. It is known that the future SLS rocket will be able to deliver into orbit up to 130 tons of various cargo. Its first test flight of the rocket will perform in 2017.