The U.S. Senate Armed Services Committee on Thursday approved a plan that would add $100 million to the U.S. military budget to start work on a new U.S. rocket engine and eliminate reliance on a Russian-made engine used to lift big government satellites into orbit. _0"> The House Armed Services Committee included a similar provision in its defense authorization bill earlier this month. Tensions with class="mandelbrot_refrag"> Russia have sparked growing concerns about the use of Russian-made RD-180 engines by the United Launch Alliance, a joint venture of class="mandelbrot_refrag"> Boeing Co and class="mandelbrot_refrag"> Lockheed Martin Corp that is responsible for launching U.S. military and spy satellites into space. true ULA uses the Russian-made engines in one type of rocket, the Atlas, but not in another, the Delta. A high-ranking Russian official recently threatened to end sales of the Russian rocket engines for