Russia Bans U.S. From International Space Station: America Strikes Back, Motley Fool
"On Monday, ULA confirmed that it has signed contracts with "multiple" American rocket companies to begin working up "next-generation liquid oxygen/hydrocarbon first stage propulsion concepts" that could replace the RD-180 (the RD-180 uses liquid oxygen and kerosene as its fuel sources). Working at a breakneck pace, ULA said it expects to select a new design before the end of this year. Then, pushing the envelope on the usual five- to eight-year timeline usually needed to develop such engines, ULA said it will have a new rocket ready to fly by 2019. (In the meantime, ULA will try to string Russia's Energomash along, negotiating to keep the RD-180s coming until they're no longer needed.)"
ULA signs multiple contracts to pursue RD-180 engine replacement, Denver Post
"While the RD-180 has been a remarkable success, we believe now is the right time for American investment in a domestic engine," ULA's CEO Michael Gass said in a statement. "At the same time, given that ULA is the only certified launch provider of our nation's most important satellites, it is critical that America preserve current capabilities and options while simultaneously pursuing this new engine." ULA's announcement comes a week after the U.S. House Appropriations Committee asked for $220 million in the 2015 defense budget to go toward developing an alternative to the RD-180."
Sen. McCain Raises Concerns About Lack of Transparency on USAF RD-180 Procurement
"I am, in particular, interested in learning more about a company called RD Amross, the company from which United Launch Alliance (ULA) actually buys the RD-180 for use in EELV missions. It appears that RD Amross is a joint venture between P&W Power Generation Inc. and International Space Engines, Inc., a Delaware-registered subsidiary of the engine's Russian manufacturer NPO Energomash."