Three Chinese disease control experts (1st, 2nd and 3rd L) pose for a group photo with a doctor of Chinese medical team in Sierra Leone upon their arrival at the airport of Freetown, capital of Sierra Leone, Aug. 12, 2014. A team of three Chinese medical workers arrived in Sierra Leone's capital Freetown on late Tuesday to help the country fight against the deadliest-ever Ebola virus which has claimed over 1,000 lives in west African countries. (Xinhua/Lin Xiaowei)