GANGNEUNG, South Korea — If smiles could win gold medals, Jerica Tandiman wouldn't have any competition. "I can't believe I'm here. It's so surreal," said the U.S. speed skater. In the Gangneung Oval, Tandiman will be making her Olympic debut as a speed skater for Team USA. "Every time I walk into the rink and every time I walk into the village … ‘Jerica, you're really here,’" she said.