The eighth Delhi Half Marathon was held in the Capital on Sunday. For more than 13,000 runners, serious and casual, it wasn't just the morning chill and mist that they had to beat, but also the severe air pollution levels. For the record, Birhanu Legese of Ethiopia and Kenya's Cynthia Limo overcame stiff competition in the men's and women's elite field, respectively, to become first-time winners. An NDTV special report.