Semerenko Keeps Calm and Cleans for Mass Start Victory; Dunklee 20th, Heinicke 24th
On the closing day of 2015 IBU World Championships, Ukraine's Valj Semerenko became an individual world champion in the women's mass start, beating Germany's Franziska Preuss by 6.2 seconds with perfect shooting. American Susan Dunklee finished 20th with five penalties and Canada's Megan Heinicke shot 19-for-20 to place 24th.