Britain's Mo Farah broke the two-mile indoor world record with a superb run at the Birmingham Indoor Grand Prix.
Farah, 31, left the field behind as he stormed home in a time of eight minutes 3.40 seconds - breaking Kenenisa Bekele's previous record of 8:04.34.
It is the double Olympic champion's first world record.
"This means a lot to me," Farah told BBC Sport. "I love representing my country, giving something back to all the people. Unbelievable."
The build-up to Saturday's race had been dominated by a row with Great Britain team-mate Andy Vernon.
Farah claimed Vernon had questioned his nationality after the double Olympic champion won European 10,000m gold in 2014, with Vernon describing that as a "huge, huge misrepresentation".
The bad feeling clearly did not upset Farah on the track as he dominated the field in Birmingham, leaving American Bernard Lagat trailing as he powered away on the closing laps.
"It was amazing," said Farah. "Training's been going well. I knew I could go close but I hadn't raced in so long.
"The crowd got really behind me - I'm so pleased. It was an amazing atmosphere.
"So many people have asked me when I was going to beat a world record. I really wanted to do it. Thank you, everyone."
"It's been a difficult week and maybe he was fired up by everything that's gone on. That was Mo Farah at his very best. That was a tough record to beat. Farah ran a sub-four minute second mile. That is a performance that shows he is in great shape and it shows the calibre of the man."