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And we have new reporting tonight, new images here in the investigation into a deadly ambush in niger and the deaths of four american soldiers. national geographic tonight with never before seen images prior to that fatal mission. heres abcs chief global affairs correspondent martha raddatz tonight. >> reporter: this is 25-year-old ladavid johnson, just weeks before he and three other americans would be ambushed and killed. the tattoo across his chest, myeshia, his wife. and here he is with nige...