Bjoergen's finished third behind a stunning USA gold in cross-country skiing's women's team sprint free.
"I think I'll need to have time to myself and look behind me and see how I've been able to do this. It's still hard to understand it when I'm standing here," said Bjoergen after the race.
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The 37-year-old is now also the second most successful woman at either the Summer or Winter Games, trailing only Soviet gymnast Larisa Latynina with 18 medals.