Nasa needs Energia.
Energia for a manned mission to Mars!
"Russia's Energia heavy lift booster can lift up to 175 tonnes of payload into orbit (8 boosters + Energia-M upper stage). That is 75 more than the Mars mission requirement, and 145 more than the U.S shuttle."
"Energia Corp even allows for licensed construction of their rockets overseas, so new Energias could be built in the U.S!"