Sochi 2014: Marit Bjoergen beats Charlotte Kalla to skiathlon gold

Norway's Marit Bjoergen defends her women's 15km skiathlon title, narrowly beating Sweden's Charlotte Kalla in a thrilling finish.

The victory was the fourth career Olympic gold for the "Iron Lady" of cross-country skiing.

Norwegian Heidi Weng claimed bronze in the first cross-country skiing event of the 2014 Sochi Winter Olympics.