Passadena, California – This audio diary is part of the Powerful Signals Radio Series. Tracy Drain is an engineer who helped build the Mars Reconnaissance Orbiter. Today we follow Tracy as she waits for the orbiter to reach the red planet. (9:42) For more information, visit the Women In Science On The Air! website at www.womeninscience.org. Powerful Signals: Transforming the Role of Women and Girls In Science and Engineering was made possible by support from the National Science Foundation.