Fil-American sprinter Kristina Knott breaks Lydia De Vega-Mercado’s 33-year-old national record in the 100-meter dash. (REUTERS / Athit Perawongmetha) Fil-American sprinter Kristina Knott smashed Lydia De Vega-Mercado’s 33-year-old national record in the 100-meter dash after settling for the...