Channel 4 News has exclusive access to secret filming by Unreported World showing the "blood diamond" industry is still gripping Africa as troops continue to abuse Zimbabwe's diamond panners...Tonight's Unreported World contains secretly filming from Chiadzwa, the heart of the diamond-rich area near the border with Mozambique. It shows how diamond panners are used as virtual slave labour, while the proceeds of smuggled diamonds go to the Zimbabwean military and middlemen. President Robert Mugabe's associates benefit, while the people of Zimbabwe get little or no return. [refers to Anjin (joint venture Anhui Foreign Economic Construction & Zimbabwe Mining Development Corporation)]