The track world is back on its axis.
Usain Bolt was a runaway winner in the men's 200 meters Saturday at the World Championships in Daegu, South Korea.
After being disqualified for a false start in the 100, the Jamaican who is track and field these days clocked 19.40, fourth fastest time ever in the event, to beat Walter Dix of the United States by .3 seconds.
Bolt's run followed an equally brilliant hurdles performance by Sally Pearson, 24, of Australia, who had thoroughly dominated the event in each of the three rounds. Pearson, the 2008 Olympic silver medalist, also was a runaway winner in a championship record 12.28 seconds.
U.S. hurdlers Danielle Carruthers and Dawn Harper, the 2-3 finishers, both ran personal best 12.47 and were two meters behind Pearson at the finish. In winning her first world medal, Pearson became fourth fastest woman in 100-meter hurdles history.
But the penultimate day of the 13th world meet was not without a surprise. That came in the men's 1,500 meters, when Matthew Centrowitz of the United States delivered a stirring stretch run for the bronze medal behind Kenyans Asbel Kiprop and Silas Kiplagat.
Added to Jennifer Simpson's gold in the women's 1,500, it was the first time since 1983 that U.S. runners had won medals in both metric miles.
And Allyson Felix added another gold medal to her impressive career total, now a world meet record seven. Felix ran the second leg of the 4 x 400 meter relay, which Team USA (Sanya Richards-Ross, Felix, Jessica Beard, Francena McCorory) dominated from start to finish in clocking 3:18.09, beating Jamaica by .62 seconds.
Bolt took no chances at the start of the 200. His reaction time, .196 seconds, was the slowest in the field and nearly twice the allowable .1.
He still was in command of the race before the end of the curve.
Only Bolt (19.19 and 19.30) and Michael Johnson (19.32) ever have run faster.
Bolt, world record-holder at 100 and 200, now has won two straight world titles and the Olympic title in the longer race. He also is reigning Olympic champion at 100.
Bronze medalist Christophe Lemaitre of France had the most unexpectedly impressive performance in the 200 final, lowering his personal best by .36 to 19.80.
In the 1,500, the runners crawled for nearly three laps, with Centrowitz holding second place most of that time. When the acceleration began, leading to a final lap of 51.5, he slipped back several places.
But the 21-year-old senior at the University of Oregon, whose father competed in the event at the 1976 Olympics, showed stunning poise for a runner in his first senior international championship.
With about 200 meters to go, Centrowitz began a surge that would not only take him to bronze but also dramatically close the final gap on the Kenyans. Kiprop -- the first Kenyan to win the world 1,500 -- clocked 3:35.69, followed by Kiplagat in 3:35.92 and Centrowitz in 3:36.08.
In the relay final, 2009 world 400 champion Richards-Ross led off with a brilliant leg of 49.3, belying the health struggles all season that left her a badly beaten seventh (51.32) in the open 400. All four U.S. runners were clocked unofficially at under 50 seconds, with 400 silver medalist Felix at 49.4.
Going into the final day of competition Sunday, the United States maintained its lead over Russia in both gold (10-7) and overall (21-17) medal counts.