U.S. Air Force sees issue with 2019 deadline for U.S. rocket engine
February 25, 2015 at 11:30 AM EST
WASHINGTON, Feb 25 (Reuters) - The U.S. Air Force may miss a 2019 deadline for developing a U.S. engine to replace the Russian-built RD-180 motors that now power some rockets used to launch military satellites into space, Air Force Secretary Deborah James said Wednesday.