NASA's new budget request continues the Obama administration's emphasis on using commercial spacecraft to send humans to space, and the players are putting their cards on the table as the next round of play begins.A new transatlantic entry in the agency's Commercial Crew Development (CCDev-2) seed-money effort would marry the first stages from NASA's defunct Ares I crew launch vehicle and Europe's Ariane 5, which turns out to be a pretty good substitute for the Ares I upper stage Boeing was building under the old Constellation program.
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