Fiscal years 2008-2010 are very, very difficult budget years at NASA, because we are engaged in completing the space station, while at the same time trying to gain ground on replacing the shuttle with the new Orion and Ares I systems. Even so, Orion will not be operational until FY14, the last year allowed by presidential policy guidance. It had been hoped by many in NASA, the White House and Congress that we could deploy Orion as early as 2012. The later delivery of this key first element in the exploration architecture was accepted precisely because no one wanted to cut the science budget in order to deploy a shuttle replacement vehicle earlier. This was a serious and significant commitment to science at NASA, one which was made in the face of very tough issues in the human spaceflight program. That commitment implies that the United States, in the face of growing international competition, will not have a human spaceflight capability of its own for at least 4 years. This was an enormous step and raises national issues far beyond any in science. The above decisions are consistent with a long period of support for and growth in the portfolio of SMD. Science today comprises a larger piece of the NASA portfolio than ever before: 32 percent today as compared with 24 percent back in the mid-90s. While we will still launch a mission to Mars at every orbital opportunity, we have rebalanced what many viewed as an excessive increase-about 40 percent-to robotic Mars exploration at the expense of other areas in science. Further, we have restored some cuts made previously in Earth science and sponsored a National Academy study to produce the equivalent of a 'decadal survey' in this field for the first time. These decisions reflect a commitment Part 2. NASA, Science, Commerce and Engineering 141 by NASA to long-term balance in our science portfolio and recognition of the key role of Earth science in that portfolio. Earth science at NASA receives $1.5 billion annually, more than 25 percent of our science portfolio. There has been a strong, visible and clear intent by NASA management to restore the previously cancelled Hubble servicing mission, if it is technically possible to do so. A final decision and an accompanying announcement should be made by November. In support of both National Academy priorities and long-standing international commitments, we have the reviewed the Stratospheric Observatory for Infrared Astronomy (SOFIA) mission, restored funds to the program and redirected the management strategy so as to offer the greatest possibility for ultimate success, despite a history of significant overruns and schedule slips. We've completed the Earth Observing System with the recent launches of Cloudsat and the Cloud-Aerosol Lidar and Infrared Satellite Observation (CALIPSO) mission, and will be taking part in the multi-agency National Polar-orbiting Operational Environmental Satellite System (NPOESS) effort through our development of the NPOESS Preparatory Program (NPP). And we've recently placed the system integration responsibility for the Landsat Data Continuity Mission (LDCM) here at Goddard.