rtokens: Zairean troops expelled 15,000 refugees in August last year .
pos: NNP VBD PRP VBD VBN NNS MD VB IN NNS .
tokens: RDR said it feared forced expulsions would start in days .
ltokens: He said the repatriation would be carried out swiftly and would be enormous , starting with the closure of refugee camps .