Tadese joins elite world Half Marathon field

(Reuters) - Half Marathon record holder Zersenay Tadese of Eritrea has joined Britain's Mo Farah and Kenya's reigning champion Geoffrey Kamworor in an elite field for the world championships in Cardiff on March 26. Tadese, 34, has held the record of 58 minutes 23 seconds since March 2010 and will be chasing his 14th world Half Marathon championship medal in a career haul that includes six golds. Five Eritrean runners finished in the top 10 in Copenhagen two years ago and their team for Cardiff w