<p>"Most definitely a sweep," said the head-band wearing Jackson after his victory at the US trials in 48.03 seconds. <br /><br />"We have the greatest hurdlers in the world. I don't think other countries in the world can compete with America." <br /><br />The 2004 Olympic gold medallist Shawn Crawford sped to a wind-assisted 19.73 seconds in winning the men's 200, while World champion Allyson Felix claimed the women's race in 22.02 seconds to set up another US-Jamaica sprint showdown in the Berlin World Championships. "That's the fastest my body has ever moved in its lifetime," said 31-year-old Crawford, whose non-assisted best is 19.79 seconds. <br /><br />Dawn Harper backed up her Beijing gold medal with a wind-assisted 12.36 seconds in the women's 100 metres hurdles, but there was disappointment in the heptathlon when Olympic silver medallist Hyleas Fountain withdrew after five events with a neck injury. <br /><br />Only the top three finishers in the cut-throat trials and defending World champions <br />qualify for the American team for the August 15-23 Worlds. <br /><br />Young collegian Johnny Dutch claimed second behind Jackson in the 400 hurdles with a lifetime best 48.18, with Olympic champion Angelo Taylor third in 48.30. <br /><br />They will be joined by World champion and Olympic silver medallist Kerron Clement, who has a bye to Berlin as the defending global champion.<br /><br />World 100 metres hurdles champion Michelle Perry also took advantage of a bye and did not run the final after locking arms with hard-luck Lolo Jones in the semifinals. The collision knocked Jones out of the race and the championships. Ginnie Powell and Damu Cherry will join Harper and Perry in Berlin. <br /><br />Olympic silver medallist Christian Cantwell topped the men's shot put at 21.82 metres with Dan Taylor, World champion Reese Hoffa and former global winner Adam Nelson also making the team.</p>
<p>"Most definitely a sweep," said the head-band wearing Jackson after his victory at the US trials in 48.03 seconds. <br /><br />"We have the greatest hurdlers in the world. I don't think other countries in the world can compete with America." <br /><br />The 2004 Olympic gold medallist Shawn Crawford sped to a wind-assisted 19.73 seconds in winning the men's 200, while World champion Allyson Felix claimed the women's race in 22.02 seconds to set up another US-Jamaica sprint showdown in the Berlin World Championships. "That's the fastest my body has ever moved in its lifetime," said 31-year-old Crawford, whose non-assisted best is 19.79 seconds. <br /><br />Dawn Harper backed up her Beijing gold medal with a wind-assisted 12.36 seconds in the women's 100 metres hurdles, but there was disappointment in the heptathlon when Olympic silver medallist Hyleas Fountain withdrew after five events with a neck injury. <br /><br />Only the top three finishers in the cut-throat trials and defending World champions <br />qualify for the American team for the August 15-23 Worlds. <br /><br />Young collegian Johnny Dutch claimed second behind Jackson in the 400 hurdles with a lifetime best 48.18, with Olympic champion Angelo Taylor third in 48.30. <br /><br />They will be joined by World champion and Olympic silver medallist Kerron Clement, who has a bye to Berlin as the defending global champion.<br /><br />World 100 metres hurdles champion Michelle Perry also took advantage of a bye and did not run the final after locking arms with hard-luck Lolo Jones in the semifinals. The collision knocked Jones out of the race and the championships. Ginnie Powell and Damu Cherry will join Harper and Perry in Berlin. <br /><br />Olympic silver medallist Christian Cantwell topped the men's shot put at 21.82 metres with Dan Taylor, World champion Reese Hoffa and former global winner Adam Nelson also making the team.</p>