World champs Knierim, Frazier dazzle in Day 1 at nationals


              Valentina Plazas and Maximiliano Fernandez compete in the pairs short program at the U.S. figure skating championships in San Jose, Calif., Thursday, Jan. 26, 2023. (AP Photo/Godofredo A. Vásquez)
            
              Valentina Plazas and Maximiliano Fernandez compete in the pairs short program at the U.S. figure skating championships in San Jose, Calif., Thursday, Jan. 26, 2023. (AP Photo/Godofredo A. Vásquez)
            
              Valentina Plazas and Maximiliano Fernandez compete in the pairs short program at the U.S. figure skating championships in San Jose, Calif., Thursday, Jan. 26, 2023. (AP Photo/Godofredo A. Vásquez)
            
              Alexa Knierim and Brandon Frazier compete in the pairs short program at the U.S. figure skating championships in San Jose, Calif., Thursday, Jan. 26, 2023. (AP Photo/Godofredo A. Vásquez)
            
              Alexa Knierim and Brandon Frazier compete in the pairs short program at the U.S. figure skating championships in San Jose, Calif., Thursday, Jan. 26, 2023. (AP Photo/Godofredo A. Vásquez)
            
              Alexa Knierim and Brandon Frazier compete in the pairs short program at the U.S. figure skating championships in San Jose, Calif., Thursday, Jan. 26, 2023. (AP Photo/Godofredo A. Vásquez)
            
              Alexa Knierim and Brandon Frazier compete in the pairs short program at the U.S. figure skating championships in San Jose, Calif., Thursday, Jan. 26, 2023. (AP Photo/Godofredo A. Vásquez)