Elizabeth Beisel

Hungary's 'Iron Lady' Breaks Through With Gold

RIO DE JANEIRO — After repeated frustration on the sport's biggest stage, Katinka Hosszu of Hungary crushed the world record in the women's 400-meter individual medley Saturday night to make the first Olympic medal of her career gold.

Also on a late night of swimming to kick off the Rio Games, Japan's Kosuke Hagino ended American dominance in the men's 400-meter IM, while Australia's Mack Horton took down Sun Yang of China without giving his bitter rival so much as a passing glance.

Hosszu, known as the "Iron Lady" for her grueling schedule, led all the way and touched in 4:26.36, easily eclipsing the record of 4:28.43 held by China's Ye Shiwen.

Hosszu had time...