The 25-year-old added the world title to the Olympic crown she won last

September, but it was a mighty close finish.

Jones won in 22.39 seconds from Debbie Ferguson of the Bahamas (22.52) with

fellow American Kelli White taking the bronze in 22.56.

Her defeat to Ukraine's Zhanna Pintusevich-Block in the 100m on Monday

ranks as one of the great upsets in the sport in recent years, but she

proved her title-winning pedigree with a brave display in the 200m.

She led from the front and ran a great bend - only to come under pressure

from Ferguson as she tired in the closing stages, but Jones held on in the

final metres to win with a stride to spare in front of the biggest crowd at

the championships.

"It was rough for me earlier in the week but the crowd really got behind

me," a relieved Jones said.

"It was wonderful - it seemed like everyone in this stadium was cheering

for me. I knew I had to put it together in the early stages, because I

didn't know how long I could hold on for.

"I could feel Debbie coming (near the finish) and I was getting tired. But

I ran a strong curve.

"Before the race I was very emotional. I really wanted this."