Omar García-Ricard (PhD candidate) and Karen Guerrero-Medina (undergraduate) have been elected 2012 NASA Students Ambassadors. Both of them have served as NASA summer interns in the past, in part due to their research work experience with Dr. Arturo Hernández-Maldonado.
http://intern.nasa.gov/intern/content/ambassador-listing/ambassador-profile/ambassador_id=465.html
http://intern.nasa.gov/intern/content/ambassador-listing/ambassador-profile/ambassador_id=484.html