The danger for scientists who participate in space missions is that you can sacrifice most of your career on one mission, and if it fails... Genesis was one of the new small missions, not in the same league with Cassini, which had a 22 year history behind it when it succesfully was inserted on orbit around Saturn. When the nominal mission ends in 2008 - and Cassini can work several years after that - some folks have spent 26 years of their lives on the mission. That´s dedication.