All 14 national delegations in the European Space Agency’s Science Programme Committee have backed the project to send a spacecraft to Mars in 2003. Support for Mars Express, as this exciting mission is called, is qualified by concern about the long-term budget of ESA’s science programme. At its meeting in Paris on 2 and 3 November, the Science Programme Committee made its approval of the implementation of Mars Express conditional on sufficient funding for the science programme and no impact on previously approved projects.