June 11, 2011 10:38 am Parents of Sabrina Keller Speak Out Sabrina Keller, a San Marcos teenager and girl scout, died after collapsing at a school dance Thursday due to an unknown cause. US & World Videos 2:46 San Diego beach visitors deal with chilly conditions Memorial Day weekend 0:46 Carlsbad house fire kills 1 person, injures another, closes roads 5:26 Scripps researchers use the ocean floor to study climate change 2:49 Future of beach yoga classes uncertain due to issues with city permits 2:40 Memorial Day weekend in San Diego County survival guide