Diggins passed the Swedes and the Norwegians on the final lap to make history in a major upset. "I just couldn't believe how lucky I was to have a teammate like that". She rounded the final corner and took dead aim at Sweden's Stina Nilsson on the final 100-meter homestretch. "It's just so fun to put it together".
Diggins and Randall have been building toward this moment for years, since they teamed up to win gold at the 2013 world championships. The last victor was Bill Koch, who took home silver in the men's 30 km sprint - but gold has constantly been out of the USA's reach in the event, which is routinely dominated by Nordic countries.
Bjørgen's third-place finish broke a tie with Norwegian biathlete Ole Einar Bjørndalen for the most Winter Olympic medals.
Through the first four women's events in PyeongChang, Diggins was close - oh, so close.
"When you're still an athlete you just have focus on other races". Of course, she was bummed, but you could tell she was happy for me.
"It's still hard to understand it when I'm standing here".
The women's team sprint is a relay race.
She was a Minnesota state champion as a high school freshman, then won two more state titles before she graduated in 2010.
"It's very big for me to be in the same team as this fabulous woman".
Who else? Norway's Johannes Hoesflot Klaebo and Martin Johnsrud Sunday dominated for the men's team sprint gold.
Bjoergen, who already had won gold, silver and bronze at the Pyeongchang Games, said she was happy to see the Americans win this one.
Rounding out the podium were France's Maurice Manificat and Richard Jouve in 15:58.28. She came back in time to win her third world championship medal (bronze in freestyle sprint) last February.
"It is an incredible feeling to finish first here", Klæbo said.
"Just having it happen at a team event", Diggins said, "means so much more to me than any individual medal ever would".
Sundby, part of Norway's 4x10km relay team and was the silver medallist in the 15km + 15km skiathlon here, claimed his team-mate inspired him. A bubbly kid who did normal kid activities, such as swim team and dance, she got into cross-country skiing because her parents liked the sport. It is just the second Olympic cross-country medal won by an American.