'Dancing queen' cautious ahead of Paris

An orphan who grew up without even a picture of her mother, Kenyan Olympic hopeful Mary Moraa's personal hardships keep her cautious about her chances in Paris - despite being crowned world 800m champion last year.

She leapt over the finish line in Budapest in August to achieve a career best of 1:56.03, ahead of Britain's Keely Hodgkinson and the defending champion, American Olympian Athing Mu.

Moraa (right) celebrated with a few of the moves that have earned her the nickname "dancing queen" in her home country.

The levity masks the difficulties the 24-year-old has had to overcome in life, and her determination to succeed for her siblings.

"I push myself to the limits, because I'm the breadwinner for my family," she said in an interview.