NASA will not be getting the $1 billion budget boost civil space advocates had hoped to see when President Barack Obama sends his 2011 spending proposal to Congress Feb. 1, requiring the U.S. space agency to make even tougher than expected choices about the future of its manned space program, according to sources with close ties to the administration. These sources declined to reveal the fate of NASA’s planned Ares 1 crew launch vehicle, which many observers see as a likely cancellation target, but they did say the budget proposal would fund a multibillion-dollar effort to foster development of commercial...