NASA, ESA: No Agreement on Mars Mission, Aviation Week

"NASA Administrator Charles Bolden and his European Space Agency counterpart, Director General Jean-Jacques Dordain, failed to settle their differences on restructuring the two agencies' joint robotic Mars exploration program at a meeting Oct. 3, and now hint that it may be time to bring Russia or another partner into the mix. At issue is how much of the joint program that was worked out when the two agencies had a brighter fiscal outlook can be salvaged in today's tougher economic environment."